S Mahendra Raj1, Keng Ee Choo, A Majid Noorizan, Yeong Yeh Lee, David Y Graham. 1. 1Pantai Medical Centre, Kuala Lumpur, and 2School of Medical Sciences, University Sains Malaysia, Kota Bharu, Kelantan, Malaysia; 3Michael E. DeBakey Veterans Affairs Medical Center and Baylor College of Medicine, Houston, Texas.