Chinese herbal medicine (Guben Qushi Huayu formula) combined with Ixekizumab in reducing psoriasis vulgaris relapse: Protocol for a mixed-methods research study - Li, Ziqing; Guan, Kewen; Deng, Hao; Ye, Shuyan; Deng, Jingwen; Yao, Danni; Yan, Yuhong; Chen, Haiming; Lu, Chuanjian; Yu, Jingjie (Frontiers in Pharmacology, 2025)