The efficacy and safety of herbal formulas for adults with pulmonary hypertension combined with chronic obstructive pulmonary disease: a systematic review and meta-analysis involving 1,865 participants - Liang, Rui; Liu, Dong; Li, Haobo; Yan, Yue; Xie, Wanmu; Zhai, Zhenguo (Journal of Thoracic Disease; Vol 16, No 9 (September 30, 2024): Journal of Thoracic Disease, 2024)