[1] Majmaah Univ, Coll Med, Dept Internal Med, Al Majmaah 11952, Saudi Arabia
[2] Majmaah Univ, Coll Med, Al Majmaah, Saudi Arabia
[3] Qassim Univ, Coll Med, Buraydah, Saudi Arabia
[4] King Fahad Hosp, Dept Internal Med, Medina, Saudi Arabia
[5] Princess Nourah Bint Abdulrahman Univ, Coll Med, Dept Family & Community Med, Riyadh, Saudi Arabia
[6] Princess Nourah bint Abdulrahman Univ, Coll Med, Dept Family & Community Med, POB 84428, Riyadh 11671, Saudi Arabia