CANCER RESEARCH, vol. 59, no. 20, page. 5128 - 5132, 1999-10-15
JOURNAL OF IMMUNOLOGY, vol. 163, no. 1, page. 15 - 20, 1999-07-01
MOLECULES AND CELLS, vol. 9, no. 1, page. 31 - 36, 1999-02-28