Affiliation: | Kee Tat Lee, Department of Medicine, Hospital Sultanah Bahiyah, Alor Setar 05460, Kedah, MalaysiaKar Nim Leong, Ting Soo Chow, Peng Shyan Wong, Infectious Disease Unit, Department of Medicine, Hospital Pulau Pinang, Georgetown 10990, Pulau Pinang, Malaysia |