[1] George Washington Univ, Sch Med & Hlth Sci, Med Res Fellowship Program, Washington, DC 20052 USA
[2] King Fahad Med City, King Salman Heart Ctr, Riyadh, Saudi Arabia
[3] Prince Mohammed Bin Abdul Aziz Med City, Al Jouf, Saudi Arabia
[4] Univ Dammam, Dept Pediat, Dammam, Saudi Arabia
[5] Al Baha Univ, Dept Pediat, Al Baha, Saudi Arabia
[6] George Washington Univ, Dept Emergency Med, 900 23rd St NW, Washington, DC 20037 USA
[7] George Washington Univ, Dept Hlth Policy & Management, 900 23rd St NW, Washington, DC 20037 USA