Stimulated production of steroids in Inonotus obliquus by host factors from birch.
Wang LX, Lu ZM, Geng Y, Zhang XM, Xu GH, Shi JS, Xu ZH. Stimulated production of steroids in Inonotus obliquus by host factors from birch. J Biosci Bioeng. 2014 Dec; 118(6):728-31.