Ich bin stolz, Teil der Arbeitsgruppe "Metabolische und Bariatrische Chirurgie" (Leitung Univ.Prof Dr. Gerhard Prager) an der Abteilung für Viszeralchirurgie der Universitätsklinik für Allgemeinchirurgie der Medizinische Universität Wien zu sein. 

Wir sind das führende akademische Zentrum für Übergewichtschirurgie in Österreich. Dies schlägt sich auch in zahlreichen aktuellen Publikationen der Arbeitsgruppe in international  top-gerankten Fachjournalen nieder.

Felix Langer, 2022

Gensthaler L, Felsenreich DM, Jedamzik J, Eichelter J, Nixdorf L, Bichler C,Krebs M, Itariu B, Langer FB, Prager G. Trends of Overweight and Obesity in MaleAdolescents: Prevalence, Socioeconomic Status, and Impact on Cardiovascular Riskin a Central European Country. Obes Surg. 2022 Apr;32(4):1024-1033. doi:10.1007/s11695-021-05867-z. Epub 2022 Jan 18. PMID: 35041124; PMCID: PMC8933384.

Felsenreich DM, Steinlechner K, Langer FB, Vock N, Eichelter J, Bichler C,Jedamzik J, Mairinger M, Kristo I, Prager G. Outcome of Sleeve Gastrectomy Converted to Roux-en-Y Gastric Bypass and One-Anastomosis Gastric Bypass. Obes Surg. 2022 Mar;32(3):643-651. doi: 10.1007/s11695-021-05866-0. Epub 2022 Jan 14. PMID: 35028871; PMCID: PMC8866292.

Jedamzik J, Bichler C, Felsenreich DM, Gensthaler L, Eichelter J, Nixdorf L, Krebs M, Langer FB, Prager G. Conversion from one-anastomosis gastric bypass to Roux-en-Y gastric bypass: when and why-a single-center experience of all consecutive OAGB procedures. Surg Obes Relat Dis. 2022 Feb;18(2):225-232. doi: 10.1016/j.soard.2021.10.019. Epub 2021 Oct 27. PMID: 34794865.

Walter E, Langer FB, Beckerhinn P, Hoffer F, Prager G. Impact of metabolic surgery on cost and long-term health outcome: a cost-effectiveness approach. Surg Obes Relat Dis. 2022 Feb;18(2):260-270. doi: 10.1016/j.soard.2021.10.012.Epub 2021 Oct 18. PMID: 34782294.

Eilenberg M, Munda P, Stift J, Langer FB, Prager G, Trauner M, Staufer K. Accuracy of non-invasive liver stiffness measurement and steatosis quantification in patients with severe and morbid obesity. Hepatobiliary Surg Nutr. 2021 Oct;10(5):610-622. doi: 10.21037/hbsn-20-787. PMID: 34760965; PMCID:PMC8527403.

Felsenreich DM, Langer FB, Bichler C, Eichelter J, Jedamzik J, Gachabayov M, Mairinger M, Richwien P, Prager G. Surgical Technique of Diverted One-Anastomosis Gastric Bypass. Surg Technol Int. 2021 Oct 26;39:107-112. doi:10.52198/21.STI.39.GS1485. PMID: 34699605.

Herz CT, Kulterer OC, Prager M, Schmöltzer C, Langer FB, Prager G, Marculescu R, Kautzky-Willer A, Hacker M, Haug AR, Kiefer FW. Active Brown Adipose Tissue is Associated With a Healthier Metabolic Phenotype in Obesity. Diabetes. 2021 Oct 18:db210475. doi: 10.2337/db21-0475. Epub ahead of print. PMID: 34663576.

Herz CT, Kulterer OC, Prager M, Langer FB, Prager G, Marculescu R, Fauler G, Hacker M, Kautzky-Willer A, Trauner M, Haug AR, Kiefer FW. Characterization of endogenous bile acid composition in individuals with cold-activated brown adipose tissue. Mol Cell Endocrinol. 2021 Oct 1;536:111403. doi: 10.1016/j.mce.2021.111403. Epub 2021 Jul 28. PMID: 34332024.

Herz CT, Kulterer OC, Prager M, Marculescu R, Langer FB, Prager G, Kautzky-Willer A, Haug AR, Kiefer FW. Sex differences in brown adipose tissue activity and cold-induced thermogenesis. Mol Cell Endocrinol. 2021 Aug 20;534:111365. doi: 10.1016/j.mce.2021.111365. Epub 2021 Jun 11. PMID: 34126190.

Felsenreich DM, Artemiou E, Steinlechner K, Vock N, Jedamzik J, Eichelter J, Gensthaler L, Bichler C, Sperker C, Beckerhinn P, Kristo I, Langer FB, Prager G. Fifteen Years After Sleeve Gastrectomy: Weight Loss, Remission of Associated Medical Problems, Quality of Life, and Conversions to Roux-en-Y Gastric Bypass-Long-Term Follow-Up in a Multicenter Study. Obes Surg. 2021 Aug;31(8):3453-3461. doi: 10.1007/s11695-021-05475-x. Epub 2021 May 22. PMID: 34021882; PMCID:PMC8270807.

Felsenreich DM, Langer FB, Eichelter J, Jedamzik J, Gensthaler L, Nixdorf L, Gachabayov M, Rojas A, Vock N, Zach ML, Prager G. Bariatric Surgery-How Much Malabsorption Do We Need?-A Review of Various Limb Lengths in Different Gastric Bypass Procedures. J Clin Med. 2021 Feb 10;10(4):674. doi: 10.3390/jcm10040674. PMID: 33578635; PMCID: PMC7916324.

Felsenreich DM, Bichler C, Langer FB, Gachabayov M, Eichelter J, Gensthaler L, Vock N, Artemiou E, Prager G. Surgical Technique for One-Anastomosis Gastric Bypass. Surg Technol Int. 2020 Nov 28;37:57-61. PMID: 33180956. 

Arnoldner MA, Felsenreich DM, Langer FB, Weber M, Mang T, Kulinna-Cosentini C, Prager G. Pouch volume and pouch migration after Roux-en-Y gastric bypass: a comparison of gastroscopy and 3 D-CT volumetry: is there a "migration crisis"? Surg Obes Relat Dis. 2020 Dec;16(12):1902-1908. doi: 10.1016/j.soard.2020.07.024. Epub 2020 Aug 1. PMID: 32917519.

Kristo I, Paireder M, Jomrich G, Felsenreich DM, Fischer M, Hennerbichler FP, Langer FB, Prager G, Schoppmann SF. Silent Gastroesophageal Reflux Disease in Patients with Morbid Obesity Prior to Primary Metabolic Surgery. Obes Surg. 2020 Dec;30(12):4885-4891. doi: 10.1007/s11695-020-04959-6. Epub 2020 Sep 10. PMID: 32910407; PMCID: PMC7719109.

Bichler C, Jedamzik J, Felsenreich DM, Langer FB, Eilenberg M, Vock N, Steinlechner K, Eichelter J, Gensthaler L, Prager G. Stapling Through a Bougie uring Sleeve Gastrectomy in a Superobese Patient-a Video Vignette. Obes Surg. 2020 Oct;30(10):4167-4168. doi: 10.1007/s11695-020-04790-z. Epub 2020 Jul 2. PMID: 32617922; PMCID: PMC7467964.

Felsenreich DM, Arnoldner MA, Langer FB, Bichler C, Vock N, Steinlechner K, Gachabayov M, Rojas A, Beitzke D, Mang T, Prager G, Kulinna-Cosentini C. Swallow Magnetic Resonance Imaging Compared to 3D-Computed Tomography for Pouch Assessment and Hiatal Hernias After Roux-en-Y Gastric Bypass. Obes Surg. 2020 Nov;30(11):4192-4197. doi: 10.1007/s11695-020-04758-z. PMID: 32564309; PMCID: PMC7525276.

Felsenreich DM, Bichler C, Langer FB, Gachabayov M, Prager G. Sleeve Gastrectomy: Surgical Technique, Outcomes, and Complications. Surg Technol Int. 2020 May 28;36:63-69. PMID: 32359172.

Felsenreich DM, Langer FB, Prager G. Reply to the Letter to the Editor Concerning Anti-reflux Mucosectomy (ARMS) in Sleeve Gastrectomy Patients with GERD and Barrett's Esophagus. Obes Surg. 2020 Jun;30(6):2417-2418. doi:10.1007/s11695-020-04499-z. PMID: 32140921.

Jedamzik J, Eilenberg M, Felsenreich DM, Krebs M, Ranzenberger-Haider T, Langer FB, Prager G. Impact of limb length on nutritional status in one-anastomosis gastric bypass: 3-year results. Surg Obes Relat Dis. 2020 Apr;16(4):476-484. doi: 10.1016/j.soard.2019.12.012. Epub 2019 Dec 19. PMID: 32035829.

Poglitsch M, Geberth A, Krebs M, Langer FB, Mittlboeck M, Prager G. Plasma homocysteine after laparoscopic Roux-en-Y gastric bypass increases in the early postoperative phase but decreases in the long-term follow-up. A retrospective analysis. Surg Obes Relat Dis. 2020 Mar;16(3):372-380. doi: 10.1016/j.soard.2019.11.021. Epub 2019 Dec 9. PMID: 31959564.

Felsenreich DM, Langer FB, Bichler C, Eilenberg M, Jedamzik J, Kristo I, Vock N, Gensthaler L, Rabl C, Todoroff A, Prager G. Roux-en-Y Gastric Bypass as a Treatment for Barrett's Esophagus after Sleeve Gastrectomy. Obes Surg. 2020 Apr;30(4):1273-1279. doi: 10.1007/s11695-019-04292-7. PMID: 31808119.

Felsenreich DM, Langer FB, Bichler C, Kristo I, Jedamzik J, Eilenberg M, Arnoldner MA, Prager G. Surgical therapy of weight regain after Roux-en-Y gastric bypass. Surg Obes Relat Dis. 2019 Oct;15(10):1719-1728. doi: 10.1016/j.soard.2019.07.002. Epub 2019 Jul 9. PMID: 31474525.

Kristo I, Paireder M, Jomrich G, Felsenreich DM, Nikolic M, Langer FB, Prager G, Schoppmann SF. Modern Esophageal Function Testing and Gastroesophageal Reflux Disease in Morbidly Obese Patients. Obes Surg. 2019 Nov;29(11):3536-3541. doi: 10.1007/s11695-019-04020-1. PMID: 31201693.

Felsenreich DM, Langer FB, Prager G. Comments on the Letter to the Editor "The Gastric Migration Crisis in Obesity Surgery". Obes Surg. 2019 Jul;29(7):2305-2306. doi: 10.1007/s11695-019-03874-9. PMID: 30982166.

Felsenreich DM, Prager G, Kefurt R, Eilenberg M, Jedamzik J, Beckerhinn P, Bichler C, Sperker C, Krebs M, Langer FB. Quality of Life 10 Years after Sleeve Gastrectomy: A Multicenter Study. Obes Facts. 2019;12(2):157-166. doi:10.1159/000496296. Epub 2019 Mar 15. PMID: 30879011; PMCID: PMC6547272.

Felsenreich DM, Langer FB, Prager G. Reply to the Letter to the Editor "Does Sleeve Gastrectomy Cause Barrett's Oesophagus?". Obes Surg. 2018 Dec;28(12):4051-4052. doi: 10.1007/s11695-018-3542-z. PMID: 30317489.

Felsenreich DM, Langer FB, Prager G. Weight Loss and Resolution of Comorbidities After Sleeve Gastrectomy: A Review of Long-Term Results. Scand J Surg. 2018 Sep 6:1457496918798192. doi: 10.1177/1457496918798192. [Epub ahead of print]

Amor M, Itariu BK, Moreno-Viedma V, Keindl M, Jürets A, Prager G, Langer F, Grablowitz V, Zeyda M, Stulnig TM. Serum Myostatin is Upregulated in Obesity and Correlates with Insulin Resistance in Humans. Exp Clin Endocrinol Diabetes. 2018 Aug 3. doi: 10.1055/a-0641-5546. [Epub ahead of print]

Luger M, Kruschitz R, Winzer E, Schindler K, Grabovac I, Kainberger F, Krebs M, Hoppichler F, Langer F, Prager G, Marculescu R, Ludvik B. Changes in Bone Mineral Density Following Weight Loss Induced by One-Anastomosis Gastric Bypass in Patients with Vitamin D Supplementation. Obes Surg. 2018 Jul 2. doi: 10.1007/s11695-018-3353-2. [Epub ahead of print]

Felsenreich DM, Ladinig LM, Beckerhinn P, Sperker C, Schwameis K, Krebs M, Jedamzik J, Eilenberg M, Bichler C, Prager G, Langer FB. Update: 10 Years of Sleeve Gastrectomy-the First 103 Patients. Obes Surg. 2018 Jul 25. doi: 10.1007/s11695-018-3399-1. [Epub ahead of print]

Eilenberg M, Langer FB, Beer A, Trauner M, Prager G, Staufer K. Significant Liver-Related Morbidity After Bariatric Surgery and Its Reversal-a Case Series. Obes Surg. 2018 Mar;28(3):812-819. doi: 10.1007/s11695-017-2925-x.

Harreiter J, Schindler K, Bancher-Todesca D, Göbl C, Langer F, Prager G, Gessl A, Leutner M, Ludvik B, Luger A, Kautzky-Willer A, Krebs M. Management of Pregnant Women after Bariatric Surgery. J Obes. 2018 Jun 3;2018:4587064. doi: 10.1155/2018/4587064. eCollection 2018.

Felsenreich DM, Kefurt R, Schermann M, Beckerhinn P, Kristo I, Krebs M, Prager G, Langer FB. Reflux, Sleeve Dilation, and Barrett's Esophagus after Laparoscopic Sleeve Gastrectomy: Long-Term Follow-Up. Obes Surg. 2017 Dec;27(12):3092-3101. doi: 10.1007/s11695-017-2748-9.

Luger M, Kruschitz R, Kienbacher C, Traussnigg S, Langer FB, Prager G, Schindler K, Kallay E, Hoppichler F, Trauner M, Krebs M, Marculescu R, Ludvik B. Vitamin D3 Loading Is Superior to Conventional Supplementation After Weight Loss Surgery in Vitamin D-Deficient Morbidly Obese Patients: a Double-Blind Randomized Placebo-Controlled Trial. Obes Surg. 2017 May;27(5):1196-1207. doi: 10.1007/s11695-016-2437-0. Pubmed PMID: 27837387

Tardelli M, Moreno-Viedma V, Zeyda M, Itariu BK, Langer FB, Prager G, Stulnig TM. Adiponectin regulates aquaglyceroporin expression in hepatic stellate cellsaltering their functional state. J Gastroenterol Hepatol. 2017 Jan;32(1):253-260. doi: 10.1111/jgh.13415. Pubmed PMID: 27083512

Ekmekcioglu C, Maedge J, Lam L, Blasche G, Shakeri-Leidenmühler S, Kundi M,Ludvik B, Langer FB, Prager G, Schindler K, Dürrschmid K. Salt taste after bariatric surgery and weight loss in obese persons. PeerJ. 2016 Jun 9;4:e2086.doi: 10.7717/peerj.2086. eCollection 2016. PubMed PMID: 27330856; PubMed Central PMCID: PMC4906643

Felsenreich DM, Langer FB, Kefurt R, Panhofer P, Schermann M, Beckerhinn P, Sperker C, Prager G. Weight loss, weight regain, and conversions to Roux-en-Y gastric bypass: 10-year results of laparoscopic sleeve gastrectomy. Surg Obes Relat Dis. 2016 Nov;12(9):1655-1662. doi: 10.1016/j.soard.2016.02.021. Epub 2016 Feb 26. Pubmed PMID: 27317599

Kruschitz R, Luger M, Kienbacher C, Trauner M, Klammer C, Schindler K, Langer FB, Prager G, Krebs M, Ludvik B. The Effect of Roux-en-Y vs. Omega-Loop Gastric Bypass on Liver, Metabolic Parameters, and Weight Loss. Obes Surg. 2016 Mar 22.[Epub ahead of print] PubMed PMID: 27003699.

Luger M, Kruschitz R, Kienbacher C, Traussnigg S, Langer FB, Schindler K,Würger T, Wrba F, Trauner M, Prager G, Ludvik B. Prevalence of Liver Fibrosis and its Association with Non-invasive Fibrosis and Metabolic Markers in Morbidly Obese Patients with Vitamin D Deficiency. Obes Surg. 2016 Mar 17. [Epub ahead of print] PubMed PMID: 26989059.

Wolf P, Winhofer Y, Smajis S, Kruschitz R, Schindler K, Gessl A, Riedl M, Vila G, Raber W, Langer F, Prager G, Ludvik B, Luger A, Krebs M. Hormone Substitution after Gastric Bypass Surgery in patients with Hypopituitarism secondary to Craniopharyngioma. Endocr Pract. 2016 May;22(5):595-601. doi: 10.4158/EP15947.OR.Epub 2016 Jan 20. PubMed PMID: 26789341.

Leitner L, Jürets A, Itariu BK, Keck M, Prager G, Langer F, Grablowitz V,Zeyda M, Stulnig TM. Osteopontin promotes aromatase expression and estradiolproduction in human adipocytes. Breast Cancer Res Treat. 2015 Nov;154(1):63-9.doi: 10.1007/s10549-015-3603-0. Epub 2015 Oct 20. PubMed PMID: 26482249.

Luger M, Kruschitz R, Marculescu R, Haslacher H, Hoppichler F, Kallay E,Kienbacher C, Klammer C, Kral M, Langer F, Luger E, Prager G, Trauner M,Traussnigg S, Würger T, Schindler K, Ludvik B. The link between obesity andvitamin D in bariatric patients with omega-loop gastric bypass surgery - avitamin D supplementation trial to compare the efficacy of postoperative cholecalciferol loading (LOAD): study protocol for a randomized controlled trial. Trials. 2015 Aug 5;16:328. doi: 10.1186/s13063-015-0877-9. PubMed PMID: 26242295;PubMed Central PMCID: PMC4524369.

Shakeri-Leidenmühler S, Lukschal A, Schultz C, Bohdjalian A, Langer F, Birsan T, Diesner SC, Greisenegger EK, Scheiner O, Kopp T, Jensen-Jarolim E, Prager G,Untersmayr E. Surgical Elimination of the Gastric Digestion by Roux-en-Y Gastric Bypass Impacts on Food Sensitization - a Pilot Study. Obes Surg. 2015 Dec;25(12):2268-75. doi: 10.1007/s11695-015-1689-4. PubMed PMID: 25910982.

Kefurt R, Langer FB, Schindler K, Shakeri-Leidenmühler S, Ludvik B, Prager G. Hypoglycemia after Roux-En-Y gastric bypass: detection rates of continuous glucose monitoring (CGM) versus mixed meal test. Surg Obes Relat Dis. 2015 May-Jun;11(3):564-9. doi: 10.1016/j.soard.2014.11.003. Epub 2014 Nov 13. PubMedPMID: 25737101.

Felberbauer FX, Shakeri-Leidenmühler S, Langer FB, Kitzinger H, Bohdjalian A,Kefurt R, Prager G. Post-Bariatric Body-Contouring Surgery: Fewer Procedures, Less Demand, and Lower Costs. Obes Surg. 2015 Jul;25(7):1198-202. doi:10.1007/s11695-014-1493-6. PubMed PMID: 25491913.

Luger M, Kruschitz R, Langer F, Prager G, Walker M, Marculescu R, Hoppichler F, Schindler K, Ludvik B. Effects of omega-loop gastric bypass on vitamin D andbone metabolism in morbidly obese bariatric patients. Obes Surg. 2015 Jun;25(6):1056-62. doi: 10.1007/s11695-014-1492-7. PubMed PMID: 25381120.

Langer FB, Prager G, Poglitsch M, Kefurt R, Shakeri-Leidenmühler S, Ludvik B,Schindler K, Bohdjalian A. Weight loss and weight regain-5-year follow-up forcircular- vs. linear-stapled gastrojejunostomy in laparoscopic Roux-en-Y gastric bypass. Obes Surg. 2013 Jun;23(6):776-81. doi: 10.1007/s11695-013-0892-4. PubMed PMID: 23483356.

Bohdjalian A, Aviv R, Prager G, Schindler K, Bacher E, Langer F, Ludvik B. Gastric stimulation in the digestive period modifies length and contractility of the inter-digestive period in obese non-diabetic and diabetic subjects. ObesSurg. 2012 Sep;22(9):1465-72. doi: 10.1007/s11695-012-0703-3. PubMed PMID:22761022.

Kitzinger HB, Abayev S, Pittermann A, Karle B, Bohdjalian A, Langer FB,Prager G, Frey M. After massive weight loss: patients' expectations of bodycontouring surgery. Obes Surg. 2012 Apr;22(4):544-8. doi:10.1007/s11695-011-0551-6. PubMed PMID: 22101887.

Janković D, Wolf P, Anderwald CH, Winhofer Y, Promintzer-Schifferl M, HoferA, Langer F, Prager G, Ludvik B, Gessl A, Luger A, Krebs M. Prevalence ofendocrine disorders in morbidly obese patients and the effects of bariatric surgery on endocrine and metabolic parameters. Obes Surg. 2012 Jan;22(1):62-9.doi: 10.1007/s11695-011-0545-4. PubMed PMID: 22052199.

Kitzinger HB, Abayev S, Pittermann A, Karle B, Kubiena H, Bohdjalian A, Langer FB, Prager G, Frey M. The prevalence of body contouring surgery aftergastric bypass surgery. Obes Surg. 2012 Jan;22(1):8-12. doi:10.1007/s11695-011-0459-1. PubMed PMID: 21643778.

Langer FB, Shakeri-Leidenmühler S, Bohdjalian A, Schoppmann S, Zacherl J,Felberbauer FX, Vila G, Prager G. Strategies for weight regain after sleeve gastrectomy. Surg Laparosc Endosc Percutan Tech. 2010 Jun;20(3):159-61. doi:10.1097/SLE.0b013e3181e24f3b. Review. PubMed PMID: 20551813.

Langer FB, Bohdjalian A, Shakeri-Leidenmühler S, Schoppmann SF, Zacherl J,Prager G. Conversion from sleeve gastrectomy to Roux-en-Y gastric bypass--indications and outcome. Obes Surg. 2010 Jul;20(7):835-40. doi:10.1007/s11695-010-0125-z. PubMed PMID: 20393810.

Bohdjalian A, Langer FB, Shakeri-Leidenmühler S, Gfrerer L, Ludvik B, ZacherlJ, Prager G. Sleeve gastrectomy as sole and definitive bariatric procedure: 5-year results for weight loss and ghrelin. Obes Surg. 2010 May;20(5):535-40.doi: 10.1007/s11695-009-0066-6. Epub 2010 Jan 22. PubMed PMID: 20094819.

Bohdjalian A, Langer FB, Kranner A, Shakeri-Leidenmühler S, Zacherl J, PragerG. Circular- vs. linear-stapled gastrojejunostomy in laparoscopic Roux-en-Ygastric bypass. Obes Surg. 2010 Apr;20(4):440-6. doi: 10.1007/s11695-009-9998-0. Epub 2009 Oct 24. PubMed PMID: 19856035.

Langer FB, Bohdjalian A, Shakeri-Manesch S, Felberbauer FX, Ludvik B, ZacherlJ, Prager G. Inadequate weight loss vs secondary weight regain: laparoscopic conversion from gastric banding to Roux-en-Y gastric bypass. Obes Surg. 2008Nov;18(11):1381-6. doi: 10.1007/s11695-008-9479-x. Epub 2008 Apr 26. PubMed PMID:18438619.

Felberbauer FX, Langer F, Shakeri-Manesch S, Schmaldienst E, Kees M, KriwanekS, Prager M, Prager G. Laparoscopic sleeve gastrectomy as an isolated bariatric procedure: intermediate-term results from a large series in three Austrian centers. Obes Surg. 2008 Jul;18(7):814-8. doi: 10.1007/s11695-008-9483-1. Epub2008 Apr 8. PubMed PMID: 18392898.

Langer FB, Bohdjalian A, Felberbauer FX, Fleischmann E, Reza Hoda MA, Ludvik B, Zacherl J, Jakesz R, Prager G. Does gastric dilatation limit the success ofsleeve gastrectomy as a sole operation for morbid obesity? Obes Surg. 2006 Feb;16(2):166-71. PubMed PMID: 16469218.

Langer FB, Reza Hoda MA, Bohdjalian A, Felberbauer FX, Zacherl J, Wenzl E,Schindler K, Luger A, Ludvik B, Prager G. Sleeve gastrectomy and gastric banding: effects on plasma ghrelin levels. Obes Surg. 2005 Aug;15(7):1024-9. PubMed PMID: 16105401.

Bohdjalian A, Langer F, Reza Hoda MA, Felberbauer F, Silberhumer G, ZacherlJ, Schindler K, Luger A, Ludvik B, Prager G. [Surgical treatment of obesity]. Wien Med Wochenschr. 2004 Jul;154(13-14):329-33. Review. German. PubMed PMID:15368954.