Address for correspondence: Dr. Sofian Johar, RIPAS Hospital and Gleneagles JPMC, Jalan Putera Al-Muhtadee Billah, Bandar Seri Begawan, Brunei-Muara BA1712, Brunei.; Department of Cardiology Raja Isteri Pengiran Anak Saleha Hospital and Gleneagles Jerudong Park Medical Centre, Bandar Seri Begawan, Brunei
