The potential use of propolis as a primary or an adjunctive therapy in respiratory tract-related diseases and disorders: A systematic scoping review - Zulhendri, F; Perera, C O; Tandean, S; Abdulah, R; Herman, H; Christoper, A; Chandrasekaran, K; Putra, A; Lesmana, R (Biomed Pharmacother, 2022)