[1] Stavanger Univ Hosp, Dept Gastroenterol Surg, Gerd Ragna Bloch Thorsens Gate 8, N-4011 Stavanger, Norway
[2] Univ Bergen, Dept Clin Med, Bergen, Norway
[3] Oslo Univ Hosp, Dept Transplantat Med, Oslo, Norway
[4] Univ Oslo, Inst Clin Med, Oslo, Norway
[5] Sunnybrook & Univ Toronto, Dept Surg, Toronto, ON, Canada
[6] Univ Calgary, Dept Crit Care Med, Calgary, AB, Canada
[7] Univ Chicago, Dept Surg, 5841 S Maryland Ave, Chicago, IL 60637 USA
[8] City Hope Comprehens Canc Ctr, Duarte, CA USA
[9] Harvard Med Sch, Program Global Surg & Social Change, Boston, MA 02115 USA
[10] Boston Childrens Hosp, Dept Plast & Oral Surg, Boston, MA USA
[11] Goethe Univ, Frankfurt Univ Hosp, Dept Gen Visceral & Transplant Surg, Frankfurt, Germany
[12] Chinese Univ Hong Kong, Dept Surg, Hong Kong, Peoples R China
[13] Hosp Clin San Carlos, Dept Surg, Madrid, Spain
[14] Fdn Ist Ricovero & Cura Carattere Sci IRCCS, Ist Nazl Tumori, Dept Surg, Milan, Italy
[15] Catholic Univ, Fdn Policlin Univ Agostino Gemelli IRCCS, Gen Surg Unit, Rome, Italy
[16] Univ Melbourne, Melbourne Sch Publ Hlth, Melbourne, Vic, Australia
[17] St Lukes Med Ctr, Inst Surg, Metro Manila, Italy
[18] Makati Med Ctr, Dept Surg, Makati, Italy
[19] Natl Kidney & Transplant Inst, Dept Gen Surg, Quezon City, Philippines
[20] Lund Unvi, Skane Univ Hosp, WHO Collaborating Ctr Surg & Publ Hlth Paediat Su, Dept Clin Sci Lund, Lund, Sweden