Member of Society of Epidemiologic Research
Fellow of the International Society for Affective Disorders
Fellow of the Royal Society for Public Health
Indian Public Health Association
Indian Association of Preventive and Social Medicine
Indian Science Congress Association
International Medical Sciences Academy
Indian Society for Malaria and Other Communicable Diseases
National Environmental Science Academy
Indian Psychiatric Society
Indian Academy of Paediatrics
Indian Society of Medical Statistics
International Epidemiological Association
International Psychogeriatric Association
Malaysian Primary Care Research Group
Malaysian Medical Association
Hong Kong University Alumni Association