1. Department of Military and Community MedicinePhramongkutklao College of Medicine Bangkok Thailand
2. Department of Psychiatry and NeurologyPhramongkutklao Hospital Bangkok Thailand
3. Department of MedicineMayo Clinic Rochester Minnesota USA
4. Department of MedicineMayo Clinic Jacksonville Florida USA
5. Department of MedicineUniversity of Mississippi Medical Center Jackson Mississippi USA
6. Division of Geriatric, Department of MedicinePhramongkutklao Hospital Bangkok Thailand