For example, several studies of BRCA1 and BRCA2 mutations, associated with an elevated risk of breast and ovarian cancer in women, have examined associations with environmental and behavioral modifiers such as pregnancies, history of breast feeding, smoking, diet, and so forth.
Por exemplo, varios estudos sobre as mutacións BRCA1 e BRCA2, asociadas a un risco elevado de cancro de mama e de ovario, examinaron a asociación con modificadores ambientais e comportamentais como embarazos, historial de lactación materna, fumar, dieta, e outros.