[1] Univ Sheffield, Gen Laparoscop & Colorectal Surg, Sheffield, S Yorkshire, England
[2] Univ Sheffield, Sheffield, S Yorkshire, England
[3] Fakeeh Univ Hosp, Surg Serv, Dubai, U Arab Emirates
[4] Royal Coll Surg UK, Canterbury, Kent, England
[5] Theodor Bilhrz Res Inst, Gen Surg, Giza, Egypt