Fig. 1From: Effect of availability of HIV self-testing on HIV testing frequency among men who have sex with men attending university in China (UniTest): protocol of a stepped-wedge randomized controlled trialThe flow chart of the UniTest study. Enrollment procedure: This section includes recruitment, screening, informed consent, and registration. Baseline survey procedure: This section includes a baseline questionnaire and sampling testing. Follow-up survey and intervention procedure: This section is divided into two parallel parts, including questionnaire follow-up and the stepped wedge trial designed HIV self-testing intervention. End-point survey procedure: This section includes 12 months follow-up questionnaire and sampling testingBack to article page