Shing-Yan Robert Lee1, Eric K T Yue2. 1. Department of Pediatrics and Adolescent Medicine, Pamela Youde Nethersole Eastern Hospital, 2 Lok Man Road, Chai Wan, Hong Kong. leesyr@netvigator.com. 2. Department of Pharmacy, Pamela Youde Nethersole Eastern Hospital, 2 Lok Man Road, Chai Wan, Hong Kong.