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Annals of Oncology > 1999 > 10 > 6 > 121-127
Annals of Oncology > 1999 > 10 > 2 > 197-203
European Journal of Epidemiology > 1999 > 15 > 4 > 307-311
Annals of Oncology > 1999 > 10 > 6 > 121-127
Annals of Oncology > 1999 > 10 > 2 > 197-203
European Journal of Epidemiology > 1999 > 15 > 4 > 307-311