Improving the accuracy and efficacy of diagnosing polycystic ovary syndrome by integrating metabolomics with clinical characteristics: study protocol for a randomized controlled tr... oleh Cheng-Ming Ni, Wen-Long Huang, Yan-Min Jiang, Juan Xu, Ru Duan, Yun-Long Zhu, Xu-Ping Zhu, Xue-Mei Fan, Guo-An Luo, Yi-Ming Wang, Yan-Yu Li, Qing He, Lan Xu