Effects of keto acid supplements on Chinese patients receiving maintenance hemodialysis: a prospective, randomized, controlled, single-center clinical study oleh Hai-Long Li, Hui Li, Yi-Fu Cao, Yue Qi, Wei-Qi Wang, Shi-Qin Liu, Chen-Die Yang, Xiao-Yan Yu, Tao Xu, Yan Zhu, Wei Chen, Jian-Ling Tao, Xue-Wang Li, Yuan-Yuan Ji