A. Schäfer

Linear or circular: Anastomotic ulcer after gastric bypass surgery

H. Wykypiel, F. Cakar-Beck, P. Gehwolf, 2021, Surgical Endoscopy.

Revisional Gastric Bypass After Failed Adjustable Gastric Banding—One-Stage or Two-Stage Procedure?

H. Wykypiel, M. Biebl, T. Dziodzio, 2018, Obesity Surgery.

Gastric outlet obstruction in a 5-year-old boy: Heineke-Mikulicz pyloroplasty is curative

P. Hechenleitner, M. Sanal, O. Renz, 2017 .

Laparoscopic Adjustable Gastric Banding: an Underestimated Risk Factor for the Development of Esophageal Cancer?—a Nationwide Survey

H. Wykypiel, F. Cakar-Beck, P. Gehwolf, 2018, Zeitschrift für Gastroenterologie.

Idiopathic rapidly progressive (crescentic) glomerulonephritis with myeloperoxidase antibodies--a new entity linked to female sex?

R. Waldherr, K. Andrassy, J. Koderisch, 1990, Nephron.

Lap. Nissen fundoplication leads to better respiratory symptom control than Toupet in the long term of 20 years

F. Cakar-Beck, P. Gehwolf, K. Kienzl‐Wagner, 2023, Langenbeck's Archives of Surgery.