Using Baidu Index Data to Improve Chickenpox Surveillance in Yunnan, China: Infodemiology Study - Zhaohan Wang; Jun He; Bolin Jin; Lizhi Zhang; Chenyu Han; Meiqi Wang; Hao Wang; Shuqi An; Meifang Zhao; Qing Zhen; Shui Tiejun; Xinyao Zhang (Journal of Medical Internet Research, 2023)