Abstract
The study of the possible association between acute lymphoblastic leukemia (ALL) in children and residential exposure to magnetic fields by Linet and colleagues (July 3 issue)1 was well designed and conducted. The evidence does not support all the authors' conclusions or Campion's call, in his editorial,2 for an end to further research on exposure to magnetic fields. Some results of the study are positive, and many issues remain unresolved.