Badawi Ibrahim, Khattab Maged, Campbell John
Deparment of Community and Medicine, College of Medicine, King Saud University, Abha, Kingdom of Saudi Arabia.
Saudi Med J. 1998 Mar;19(2):157-161.
Full text is available as a scanned copy of the original print version.
全文可作为原始印刷版的扫描副本获取。