We have been privileged to start our academic careers at the begin ning of the decade in which the immunological roles and hypersensitivity diseases of the gast

Howard C. Thomas In normal subjects the regulatory apparatus of the immune system permits responses to foreign antigens but suppresses those directed to "self'

This book is the proceedings of the Falk Symposium No. 135 held in Prague, Czech Republic, on September 12-13, 2003, and is dedicated to the important issue of