Efficacy of Quanduzhong capsules in regulating blood pressure circadian rhythm in essential hypertension: a multicenter, randomized, add-on controlled clinical trial. - Tang BH; Zhou CH; He RM; Li ZY; Wang JC; Cui YT; Zou JX; Xiao JP; Zhou ZG; Li XF; Yang Y; Hu JQ (Frontiers in pharmacology, 2025)