Myeloid cell‐specific mutation of Spi1 selectively reduces M2‐biased macrophage numbers in skeletal muscle, reduces age‐related muscle fibrosis and prevents sarcopenia. - Wang, Ying; Welc, Steven S.; Wehling‐Henricks, Michelle; Kong, Ying; Thomas, Connor; Montecino‐Rodriguez, Enca; Dorshkind, Kenneth; Tidball, James G. (Aging Cell, 2022)