[1] Minist Hlth Holdings, Gen Surg, Riyadh, Saudi Arabia
[2] Ain Shams Univ Hosp, Gen Surg, Cairo, Egypt
[3] Hosp Clin Botucatu, Surg, Bra, Italy
[4] King Edward Med Univ, Surg, Lahore, Pakistan
[5] Mutah Univ, Med & Surg, Al Karak, Jordan
[6] David Tvildiani Med Univ, Med, Tbilisi, Georgia
[7] Sheffield Teaching Hosp Natl Hlth Serv NHS Fdn Tr, Sheffield, S Yorkshire, England