Initial observations of Jinhua Qinggan Granules, a Chinese medicine, in the mitigation of hospitalization and mortality in high-risk elderly with COVID-19 infection: A retrospective study in an old age home in Hong Kong - Lin, Timothy P. H.; Lau, Edith M. C.; Wan, Kelvin H.; Zhong, Linda; Leung, Enne; Ko, Chung Nga; Lu, Aiping; Shah, Muhammad R.; Bian, Zhaoxiang; Lam, Dennis S. C. (Frontiers in Medicine, 2022)