Ishikane, M., Arima, Y., Itoda, I., Takahashi, T., Yamagishi, T., Matsui, T., Sunagawa, T., Oishi, K., & Ohnishi, M. (2016). Responding to the syphilis outbreak in Japan: piloting a questionnaire to evaluate potential risk factors for incident syphilis infection among men who have sex with men in Tokyo, Japan, 2015. Western Pacific Surveillance and Response, 7(3). https://doi.org/10.5365/wpsar.2016.7.2.001