国产美女高潮无套久久,无码毛片视频一区二区本码,芒果视频在线观看,亚洲无码午夜免费精品,我和我的老熟女视频,亚洲免费美女动漫精品二区,爆乳放荡的女教师在线观看,国产真人一级a爱做片无码,久久9991电影黄片,日本欧美色三级18禁黄网站,亚洲欧美婬色多多,加勒比熟妇中文高清

Melnick JL, Ledinko N. Immunological reactions of the Coxsackie viruses. I. The neutralization test; technic and application. J. Exp. Med. 92: 463-482, 1950. PubMed: 14778925

Dalldorf J. . J. Exp. Med. 89: 567-582, 1949.

Kamitsuka PS, et al. Preparation and standardization of Coxsackievirus reference antisera. I. For twenty-four group A viruses. Am. J. Epidemiol. 81: 283-306, 1965. PubMed: 14294414