Alfacalcidol plus calcium versus cholecalciferol in glucocorticoid-exposed children with nephrotic syndrome: a randomized controlled trial. - Chen, Huan Ru; Tang, Hui; Zhang, Miao; Lin, Jin Ai; Lin, Xiao Qing; Zhang, Jia Yi; Lu, Jie Yi; Xia, Hui Min; Gao, Xia; Liao, Xin (Clinical Kidney Journal, 2026)