Wei L, Chen L, Zhang H, et al. Relationship between gay app use and HIV testing among men who have sex with men in Shenzhen, China: a serial cross-sectional study. BMJ Open 2019;9:e028933. doi: 10.1136/bmjopen-2019-028933

The previous version of this manuscript left out to include co-corresponding author.

Dr. Jin Zhao; zhaoj@szcdc.net

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