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[2] NYU MED CTR, INST ENVIRONM MED, NEW YORK, NY 10016 USA
[3] NYU MED CTR, KAPLAN CANC CTR, NEW YORK, NY 10016 USA
[4] INT AGCY RES CANC, ANALYT EPIDEMIOL UNIT, F-69372 LYONS 08, FRANCE
[5] OSPED MAGGIORE SAN GIOVANNI BATTISTA CITTA TORINO, SERV ANAT PATOL, TURIN, ITALY