Real-world clinical study on the efficacy and safety of Honghua Ruyi Wan in treating primary dysmenorrheaZHANG Ke-jun, NIU Bing-qian, LI Qian, JIN Lu-kuo, LUO Xiao-mei, BIAN Wen-hui, CHEN Hui-juan, JIAO Rui-qin, HOU Jing-jing, GUO Feng-he, CUI Jun, FANG Jin-fen, LIU Cheng-zang, CUI Meng-jiao, SONG Wen-wen, GONG Cheng-feng, LIU Dong-yong, TIAN Gui-fang, SHEN Wei-ping, XU Lang-ping, LI Su-fang, CHEN Mei-xia, GAO Su-yun, YANG Ai-ling, HAO Zhi-feng, YANG Li