Incidence of syphilis seroconversion among HIV‐infected persons in Asia: results from the TREAT Asia HIV Observational Database oleh Jin Young Ahn, David Boettiger, Sasisopin Kiertiburanakul, Tuti Parwati Merati, Bui Vu Huy, Wing Wai Wong, Rossana Ditangco, Man Po Lee, Shinichi Oka, Nicolas Durier, Jun Yong Choi, on behalf of the Treat Asia HIV Observational Database