Efficacy and safety of polyherbal formulation as an add-on to standard-of-care in mild-to-moderate COVID-19: A randomized, double-blind, placebo-controlled trial oleh Suresh B. Patankar, Anupama Gorde, Kalpana Joshi, Kishor Suryawanshi, Pravin Soni, Tejas Shah, Sagar Patankar, Diwakar Jha, Rajesh Raje, Hrishikesh Rangnekar