Retraction Note: Effects of hPMSCs on granulosa cell apoptosis and AMH expression and their role in the restoration of ovary function in premature ovarian failure mice - Hongqin Zhang; Qianqian Luo; Xueyan Lu; Na Yin; Dongli Zhou; Lianshuang Zhang; Wei Zhao; Dong Wang; Pengchao Du; Yun Hou; Yan Zhang; Wendan Yuan (Stem Cell Research & Therapy, 2022)