Randomized controlled trials of Chinese herbal medicine published in English from 2010 to 2019: a bibliometrics study - Hu, Jing; Zhang, Hui-Na; Feng, Shuo; Ha, Yan-Xiang; Wei, Chong-Yang; Wang, Xue-Jiao; Zhang, Rui; Li, Bo (Annals of Palliative Medicine, 2021)