Roxadustat in treating anemia in dialysis patients (ROAD): protocol and rationale of a multicenter prospective observational cohort study oleh Yaling Zhang, Song Ren, Hen Xue, Amanda Y Wang, Yang Zou, Yanrong Cai, Jingdong He, Xiaoling Yuan, Feifei Jiang, Jinxi Wei, Dongmei Yang, Dong He, Shide Hu, Min Lei, Fei Deng, Jin Chen, Xia Wang, Qiang He, Guisen Li, Daqing Hong