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- albert einstein coll med, dept epidemiol & populat hlth, bronx, ny 10467 usa.1
- amer canc soc, atlanta, ga 30329 usa.1
- boston univ, slone epidemiol ctr, boston, ma 02215 usa.1
- danish canc soc, inst canc epidemiol, copenhagen, denmark.1
- george washington univ, washington, dc usa.1
- german canc res ctr, div canc epidemiol, heidelberg, germany.1
- int agcy res canc, f-69372 lyon, france.1
- karolinska inst, stockholm, sweden.1
- maastricht univ, maastricht, netherlands.1