Yamamoto S, Yamamoto T (November 2007). "Historical review of BCG vaccine in Japan". Japanese Journal of Infectious Diseases. 60 (6): 331-336. doi:10.7883/yoken.JJID.2007.331. PMID18032829.
Yamamoto S, Yamamoto T (November 2007). "Historical review of BCG vaccine in Japan". Japanese Journal of Infectious Diseases. 60 (6): 331-336. doi:10.7883/yoken.JJID.2007.331. PMID18032829.