TY - JOUR T1 - Saudi Medical Journal JF - Saudi Medical Journal JO - Saudi Med J SP - 2 LP - 2 VL - 21 IS - 1 AU - Saleh M. Al-Deeb AU - Basim A. Yaqub Y1 - 2000/01/01 UR - http://smj.org.sa/content/21/1/2.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -