Evaluating a WeChat-Based Health Behavioral Digital Intervention for Patients With Hypertension: Protocol for a Randomized Controlled Trial - Ting Sun; Huanhuan Zhao; Zenghui Ding; Hui Xie; Linlin Ma; Yu Zhang; Yingying Wang; Yinju Yang; Chunyi Xu; Yining Sun; Xuejie Xu; Zuchang Ma (JMIR Research Protocols, 2023)