1. HIV-NAT, Thai Red Cross AIDS Research Centre , Bangkok 10330 , Thailand
2. The Kirby Institute, UNSW Sydney , Sydney 2052 , Australia
3. Center of Excellence in Tuberculosis, Faculty of Medicine, Chulalongkorn University , Bangkok 10330 , Thailand
4. Biostatistics Excellence Centre, Faculty of Medicine, Chulalongkorn University , Bangkok 10330 , Thailand
5. Institute for Health and Aging, University of California , San Francisco, CA 94102 , USA