Bariatric Surgery

• Tanta University — Tanta, Algharbia, Egypt
• Tanta University hospitals — Tanta, Egypt

• Kantonsspital Baden — Baden, Switzerland
• University Hospital, Inselspital Berne — Bern, Switzerland
• Clinic Beau-Site — Bern, Switzerland

Not specified

• National University Hospital — Singapore

• Theodor Bilharz Research institute — Giza, Cairo Governorate, Egypt

• The Third People's Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University — Chengdu, Sichuan, China

• 2nd Department of General Surgery, Jagiellonian University Medical College — Krakow, Małopolska, Poland

• Atatürk Üniversitesi — Erzurum, Turkey (Türkiye)

• Laboratory for Clinical and Experimental Research on Vascular Biology, Rio de Janeiro State University — Rio de Janeiro, Rio de Janeiro, Brazil, Brazil

• Istanbul University-Cerrahpasa — Istanbul, Turkey (Türkiye)