MOLECULES AND CELLS, vol. 15, no. 2, page. 245 - 255, 2003-04-30
LIFE SCIENCES, vol. 65, no. 17, page. 1845 - 1856, 1999-09-17
JOURNAL OF IMMUNOLOGY, vol. 158, no. 4, page. 1895 - 1901, 1997-02-15