[1] Sharik Assoc Hlth Res, Riyadh 13326, Saudi Arabia
[2] Minist Hlth, Riyadh 11176, Saudi Arabia
[3] Imam Abdulrahman Bin Faisal Univ, Publ Hlth Coll, Dammam 31441, Saudi Arabia
[4] King Faisal Univ, Pharm Coll, Alahsa 31982, Saudi Arabia
[5] King Saud Univ, Coll Appl Med Sci, Community Hlth Sci, Riyadh 11362, Saudi Arabia
[6] King Khalid Univ, Coll Med, Dept Family & Community Med, Abha 61421, Saudi Arabia
[7] Alfaisal Univ, Coll Med, Riyadh 11533, Saudi Arabia
[8] Saudi Food & Drug Author, Riyadh 13513, Saudi Arabia
[9] King Faisal Specialist Hosp & Res Ctr, Liver Transplant Unit, Riyadh 11211, Saudi Arabia
[10] Johns Hopkins Univ, Div Gastroenterol & Hepatol, Baltimore, MD 21218 USA