Ballen KK, Valinski H, Greiner D, Shultz LD, Becker PS, Hsieh CC, Stewart FM, Quesenberry PJ. Variables to predict engraftment of umbilical cord blood into immunodeficient mice: usefulness of the non-obese diabetic--severe combined immunodeficient assay. Br J Haematol. 2001 Jul; 114(1):211-8.