Efficacy and safety of Lianhuaqingwen capsules, a repurposed Chinese herb, in patients with coronavirus disease 2019: A multicenter, prospective, randomized controlled trial - Hu, K; Guan, W J; Bi, Y; Zhang, W; Li, L; Zhang, B; Liu, Q; Song, Y; Li, X; Duan, Z; Zheng, Q; Yang, Z; Liang, J; Han, M; Ruan, L; Wu, C; Zhang, Y; Jia, Z H; Zhong, N S (Phytomedicine, 2021)