Marghalani Abdullah A, Alsahafi Yaser A, Alshouibi Ehab N
Department of Preventive Dentistry, Faculty of Dentistry, Umm Al-Qura University, PO Box 14405, Makkah 21955, Kingdom of Saudi Arabia. Tel. +966 (12) 5270000. E-mail:
Saudi Med J. 2014 Jan;35(1):93-4.