|From the Department of Medicine (Al-Nozha, Al-Maatouq, Al-Harthi, Arafah, Khalil, Nouh, Al-Mobeireek), College of Medicine and King Khalid University Hospital, Ministry of Health (Al-Mazrou), College of Dentistry (Khan), College of Science (Attas), King Saud University, Department of Adult Cardiology (Abdullah), Prince Sultan Cardiac Center, Department of Cardiovascular (Al-Shahid), King Faisal Specialist Hospital and Research Centre, Riyadh, Department of Medicine (Al-Khadra), King Fahad University, Dammam, Department of Medicine (Al-Marzouki), King Abdul-Aziz University, Jeddah, Kingdom of Saudi Arabia.
Received 19th May 2004. Accepted for publication in final form 10th July 2004.
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