From the Departments of Pediatrics (Dr. Refat), Obstetrics and Gynecology (Dr. Al-Moghanem and Ms McDonald) and Medical Records (Ms Reyes), King Fahd Hofuf Hospital, Al Hasa.

Address reprint requests and correspondence to Dr. Refat: Consultant of Neonatology, King Fahd Specialist Hospital, Buraidah, Saudi Arabia.

Accepted for publication 12 November 1994.