- Correspondence to Mrs Katie R Mollan, Center for AIDS Research, School of Medicine, University of North Carolina, Chapel Hill, CH, USA; , Dr Weiming Tang, University of North Carolina Project-ChinaGuangzhouChina; and Professor Li Ling, Faculty of Medical Statistics and Epidemiology, School of Public HealthSun Yat-sen UniversityGuangzhouChina;
- Received September 14, 2017
- Revised November 9, 2017
- Accepted November 13, 2017
- First published November 28, 2017.
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