Tanshinone IIA from Salvia miltiorrhiza inhibits inducible nitric oxide synthase expression and production of TNF-α, IL-1β and IL-6 in activated RAW 264.7 cells - Jang, S I; Jeong, S I; Kim, K J; Kim, H J; Yu, H H; Park, R; Kim, H M; You, Y O (Planta Med, 2003)