[1] King Fahad Hosp, Dept Med, Gastroenterol Unit, Jeddah, Saudi Arabia
[2] King Abdulaziz Med City Minist Natl Guard, Hepatobiliary Sci & Organs Transplant Ctr, Hepatol Sect, Riyadh, Saudi Arabia
[3] King Abdullah Int Med Res Ctr, Riyadh, Saudi Arabia
[4] King Saud bin Abdulaziz Univ Hlth Sci, Minist Natl Guard Hlth Affairs, Riyadh, Saudi Arabia
[5] Minist Hlth, Gen Directorate Communicable Dis, Riyadh, Saudi Arabia
[6] Liver Dis Res Ctr, Riyadh, Saudi Arabia
[7] King Saud Univ, Coll Med, Riyadh, Saudi Arabia
[8] Dept Med, Div Gastroenterol, King Fahd Mil Complex, Dhahran, Saudi Arabia
[9] Dept Gastroenterol & Hepatol, King Fahad Med City, Riyadh, Saudi Arabia
[10] King Faisal Specialist Hosp & Res Ctr, Dept Med, Sect Gastroenterol, Riyadh, Saudi Arabia
[11] Al Faisal Univ, Coll Med, Riyadh, Saudi Arabia
[12] Dept Med, Gastroenterol Sect, King Abdulaziz Med City, Jeddah, Saudi Arabia
[13] King Fahad Hosp, Dept Med, Gastroenterol Unit, POB 50505 450, Jeddah 21533, Saudi Arabia