Evaluating an Intervention Program Using WeChat for Patients With Chronic Obstructive Pulmonary Disease: Randomized Controlled Trial by Jiang, Yuyu, Liu, Fenglan, Guo, Jianlan, Sun, Pingping, Chen, Zhongyi, Li, Jinping, Cai, Liming, Zhao, Hongqing, Gao, Ping, Ding, Zhaosheng, Wu, Xiaoliang

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