1. Clinical Trials and Research Unit, Changi General Hospital, 2 Simei Street 3, Singapore 529889, Singapore
2. Department of Dermatology, Changi General Hospital, 2 Simei Street 3, Singapore 529889, Singapore
3. School of Chemical and Life Sciences, Singapore Polytechnic, 500 Dover Road, Singapore 139651, Singapore
4. Department of Laboratory Medicine, Changi General Hospital, 2 Simei Street 3, Singapore 529889, Singapore
5. Department of Microbiology, Singapore General Hospital, Outram Road, Singapore 169608, Singapore