About the Authors

Jun Tao

Contributed equally to this work with: Jun Tao, Ming-ying Li

Affiliation Vanderbilt Institute for Global Health, Vanderbilt University, Nashville, Tennessee, United States of America

Ming-ying Li

Contributed equally to this work with: Jun Tao, Ming-ying Li

Affiliation Xicheng District Center for Disease Control and Prevention, Beijing, China

Han-Zhu Qian

han-zhu.qian@vanderbilt.edu (H-ZQ); yugang.bao@aidshealth.org (YB)

Affiliations Vanderbilt Institute for Global Health, Vanderbilt University, Nashville, Tennessee, United States of America, Division of Epidemiology, Department of Medicine, Vanderbilt University, Nashville, Tennessee, United States of America

Li-Juan Wang

Affiliation Chaoyang District Center for Disease Control and Prevention, Beijing, China

Zheng Zhang

Affiliation Chaoyang District Center for Disease Control and Prevention, Beijing, China

Hai-Feng Ding

Affiliation Chaoyang District Center for Disease Control and Prevention, Beijing, China

Ya-Cheng Ji

Affiliation Heibei Medical University, Shijiazhuang, Hebei, China

Dong-liang Li

Affiliation Xicheng District Center for Disease Control and Prevention, Beijing, China

Dong Xiao

Affiliation Chaoyang Chinese AIDS Volunteer Group, Beijing, China

Melissa Hazlitt

Affiliation Meharry Medical College, Nashville, Tennessee, United States of America

Sten H. Vermund

Affiliations Vanderbilt Institute for Global Health, Vanderbilt University, Nashville, Tennessee, United States of America, Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America

Xiangfei Xiu

Affiliation AHF-China Program, AIDS Healthcare Foundation (AHF), Beijing, China

Yugang Bao

han-zhu.qian@vanderbilt.edu (H-ZQ); yugang.bao@aidshealth.org (YB)

Affiliations AHF-China Program, AIDS Healthcare Foundation (AHF), Beijing, China, School of Public Health, Central South University, Changsha, Hunan, China

Competing Interests

Co-authors Sten H. Vermund and Han-zhu Qian are PLOS ONE Editorial Board members, but this will not change their adherence to PLOS ONE Editorial policies and criteria.

Author Contributions

Conceived and designed the experiments: HQ DX YB XX YJ. Performed the experiments: ML LW ZZ HD DL. Analyzed the data: JT HQ SV. Contributed reagents/materials/analysis tools: JT HQ SV. Contributed to the writing of the manuscript: JT HQ SV DX YB XX YJ ML LW ZZ HD DL MH.