Diltiazem used as a tacrolimus-sparing agent for treatment of pediatric patients with refractory nephrotic syndrome: a case report and retrospective analysis - Sun, Jie-Yu; Hu, Ya-Hui; Guo, Hong-Li; Jing, Xia; Xu, Ze-Jun; Sun, Fang; Guo, Hui-Lei; Ding, Xuan-Sheng; Chen, Feng; Xu, Jing (European journal of clinical pharmacology, 2019)