[1] King Saud Univ, King Saud Univ Med City, Qual Management Dept, Clin Practice Guidelines Unit, Riyadh, Saudi Arabia
[2] King Saud Univ, King Saud Univ Med City, King Khalid Univ Hosp, Dept Pediat, Riyadh, Saudi Arabia
[3] King Saud Univ, Deanship Sci Res, Res Chair Evidence Based Hlth Care & Knowledge Tr, Riyadh, Saudi Arabia
[4] Alexandria Univ, Alexandria Ctr Evidence Based Clin Practice Guide, Alexandria, Egypt
[5] King Saud Univ, Coll Med, Dept Obstet & Gynecol, Riyadh, Saudi Arabia
[6] King Saud Univ, Coll Med, Prince Sattam Bin Abdul Aziz Res Chair Epidemiol, Riyadh, Saudi Arabia
[7] King Saud Univ, King Saud Univ Med City, Univ Oncol Ctr, Coll Med, Riyadh, Saudi Arabia
[8] Ain Shams Univ, Fac Med, Internal Med & Clin Hematol, Cairo, Egypt
[9] King Saud Univ, Coll Med, Pathol Dept, Riyadh, Saudi Arabia
[10] King Saud Univ, King Saud Univ Med City, Morbid & Mortal Unit, Riyadh, Saudi Arabia
[11] Acad Sci Res, Theodor Bilharz Res Inst TBRI, Publ Hlth & Community Med Dept, Cairo, Egypt
[12] King Saud Univ, Coll Med, Dept Med, Riyadh, Saudi Arabia