WDJ-S4, a standardized herbal formula, promotes gastrointestinal motility via modulation of the acetylcholine pathway in a loperamide-induced functional dyspepsia mice. - Hwang SJ; Seo CS; Baek DC; Woo TW; Wang JH; Lee JS; Choi YJ; Gu JY; Kim DS; Son CG (Pharmaceutical biology, 2025)