Study on the substance basis of the efficacy of eucommiae cortex before and after salt processing for the treatment of kidney-yang deficiency syndrome based on the spectrum-effect relationship

Hangsha Wu, Yue Lv, Mingfang Zhao, Rui Tang, Yafei Li, Keer Fang, Feiyang Wei, Weihong Ge, Weifeng Du, Changyu Li, Yefeng Zhang