Christianson SW, Greiner DL, Deluca D, Leif J, Phillips NE, Hayes SM, Hayashi S, Joliat MJ, Lyons BL, Shultz LD. T cell developmental defects in 'viable motheaten' mice deficient in SHP-1 protein-tyrosine phosphatase. Developmental defects are corrected in vitro in the presence of normal hematopoietic-origin stromal cells and in vivo by exogenous IL-7. J Autoimmun. 2002 Mar; 18(2):119-30.