1. Department of Women's and Infants' Services, MedStar Washington Hospital Center, Division of Women's Health Research, MedStar Health Research Institute, Washington, District of Columbia, USA.
2. Georgetown University School of Medicine, Washington, District of Columbia, USA.
3. Department of Business Management, National Sun Yat-sen University, Kaohsiung, Taiwan.
4. Division of Women's Health Research, MedStar Health Research Institute, Washington, District of Columbia, USA.
5. HIV/AIDS, Hepatitis, STD and TB Administration, DC Health, Washington, District of Columbia, USA.
6. Whitman Walker Health, Washington, District of Columbia, USA.
7. Department of Prevention and Community Medicine, George Washington University, Washington, District of Columbia, USA.