Rasheed Parveen, Koura Manal R, Al-Dabal Badria K, Makki Suhair M
Department of Family and Community Medicine, College of Medicine, King Faisal University, Dammam, Saudi Arabia.
Ann Saudi Med. 2008 Nov-Dec;28(6):449-52. doi: 10.5144/0256-4947.2008.449.