Corrigendum: A Chinese medicine formula (Bushen Huoxue Tongluo) for the treatment of chronic subjective tinnitus: a study protocol for a pilot, assessor-blinded, randomized clinical trial - Zhang, Hong Wei; Yeung, Kammy N. K.; Tong, Michael C. F.; Lin, Zhi-Xiu; Chang, Waitsz W. T.; Ng, Iris H-Y.; Sum, Chi Him; Leung, Ka Chun; Chan, Kam Leung; Ngan, Kit; Tong, Tie Jun (Frontiers in Pharmacology, 2023)