Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
Disclosure: The author declares that there is no conflicts of interest.
Address correspondence to: Leong Tung Ong, MBBS, Faculty of Medicine, University of Malaya, Jalan Universiti, Wilayah Persekutuan, Kuala Lumpur 50603, Malaysia. E-mail: [email protected].