1. Department of Paediatrics and Adolescent Medicine, Hong Kong Jockey Club Clinical Research Centre, Faculty of Medicine, The University of Hong Kong, Hong Kong, SAR, China.
2. Department of Chemistry, Faculty of Science, The University of Hong Kong, Hong Kong, SAR, China.
3. Department of Pharmacology, Hong Kong Jockey Club Clinical Research Centre, Faculty of Medicine, The University of Hong Kong, Hong Kong, SAR, China.