Sugishita, Yoshiyuki, Takuri Takahashi, Narumi Hori, and Mitsuru Abo. 2013. “Ongoing Rubella Outbreak Among Adults in Tokyo, Japan, June 2012 to April 2013”. Western Pacific Surveillance and Response 4 (3). https://doi.org/10.5365/wpsar.2013.4.2.011.