© The Rockefeller University Press, 0022-1007/2000/5/1631/ $5.00
The Journal of Experimental Medicine, Volume 191, Number 10, May 15, 2000 1631-1636
The Old and the Restless
Susanna M. Lewisa,b and
Gillian E. Wua,c
a Department of Immunology, University of Toronto,
b Program in Genetics and Genomic Biology, Hospital for Sick Children Research Institute,Toronto, Ontario M5G 1X8, Canada,
c Ontario Cancer Institute, Toronto, Ontario M5G 2M9, Canada
Correspondence to:
Susanna M. Lewis, Program in Genetics and Genomic Biology, Hospital for Sick Children Research Institute, 555 University Ave., Toronto, Ontario M5S 1X8, Canada. Tel:416-813-8980 Fax:417-813-8883 E-mail:susanna{at}sickkids.on.ca.