A HILIC-UHPLC-MS/MS untargeted urinary metabonomics combined with quantitative analysis of five polar biomarkers on osteoporosis rats after oral administration of Gushudan - Wu, X; Huang, Y; Sun, J; Wen, Y; Qin, F; Zhao, L; Xiong, Z (J Chromatogr B Analyt Technol Biomed Life Sci, 2018)