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Du, Zhicheng, Yu Liao, Chien-Chou Chen, Yuantao Hao, و Ruwei Hu. "Usual Source of Care and the Quality of Primary Care: A Survey of Patients in Guangdong Province, China." Int J Equity Health 2015.

Du, Zhicheng, et al. "Usual Source of Care and the Quality of Primary Care: A Survey of Patients in Guangdong Province, China." Int J Equity Health 2015.