1. Age of exposure to infections and risk of childhood leukaemia. Issue 6907 (25th September 1993) Authors: Petridou, E; Kassimos, D; Kalmanti, M; Kosmidis, H; Haidas, S; Flytzani, V; Tong, D; Trichopoulos, D Journal: BMJ Issue: Volume 307:Issue 6907(1993) Page Start: 774 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗