Meng, Xiangying, Shikai Wu, Zefei Jiang, Bing Sun, Yan Ma, Xin Zhao, Lijuan Ding, Yue Wang, Tao Wang, Shaohua Zhang, and Santai Song. 2013. “Progestin As an Alternative Treatment Option for multi-treated recurrent Triple-Negative Breast Cancer”. Swiss Medical Weekly 143 (2122):w13765. https://doi.org/10.4414/smw.2013.13765.