V V Visuvanathan1, K C Koh2. 1. (Corresponding author) MBBS, MRCP Department of Internal Medicine, International Medical University, Jalan Rasah, 70300 Seremban, Negeri Sembilan Darul Khusus, Malaysia. Email: vaani_valerie@imu.edu.my. 2. MBBS, BSc (Hons), MMed Department of Internal Medicine, International Medical University, Jalan Rasah, 70300 Seremban, Negeri Sembilan Darul Khusus, Malaysia. Email: kweechoy_koh@imu.edu.my.