Authors: Suhail K. Ayesh MSc, PhD Suheir M. Nassar BSc Wasif A. Al-Sharef BScBassam Y. Abu-Libdeh ,MD Hisham M. Darwish, MSc, PhDJournal Name: Saudi medical journalVolume: 26Issue: 5Pages From: 732To: 737Date: Saturday, January 1, 2005