1. Department of Paediatrics, The Chinese University of Hong Kong, CUHK Medical Centre, Shatin, Hong Kong,
China
2. Department of Pediatrics, The University of Calgary and The Alberta Children’s Hospital, Calgary, Alberta,
Canada
3. Department of Family Medicine, The University of Calgary, Calgary, Alberta, Canada
4. Department of Microbiology,
LKS Faculty of Medicine, The University of Hong, Hong Kong SAR, China