Characterization of Coxsackievirus A6- and Enterovirus 71-associated Hand Foot and Mouth disease in Beijing, China, from 2013 to 2015 oleh Jie eLi, Jie eLi, Ying eSun, Yiwei eDu, Yuxiang eYan, Da eHuo, Yuan eLiu, Xiaoxia ePeng, Yang eYang, Fen eLiu, Changying eLin, Zhichao eLiang, Lei eJia, Lijuan eChen, Quanyi eWang, Yan eHe