1. Department of Psychiatry, Tai Po Hospital, 9 Chuen On Road, Tai Po, Hong Kong
2. Department of Psychiatry, University of Hong Kong, Queen Mary Hospital, Hong Kong
3. Department of Psychiatry, Queen Mary Hospital, Hong Kong
4. Department of Psychiatry, Castle Peak Hospital, Tuen Mun, Hong Kong
5. Department of Psychiatry, Kwai Chung Hospital, Kwai Chung, Hong Kong