1. Department of Biochemistry; Chulalongkorn University; King Chulalongkorn Memorial Hospital; Thai Red Cross Society; Bangkok; Thailand
2. Department of Microbiology; Chulalongkorn University; King Chulalongkorn Memorial Hospital; Thai Red Cross Society; Bangkok; Thailand
3. Department of Surgery; Chulalongkorn University; King Chulalongkorn Memorial Hospital; Thai Red Cross Society; Bangkok; Thailand
4. Center of Excellence in Clinical Virology; Department of Pediatrics; Faculty of Medicine; Chulalongkorn University; King Chulalongkorn Memorial Hospital; Thai Red Cross Society; Bangkok; Thailand