title: Predominance of left-sided breast tumours.
mesh_terms: D000230:Adenocarcinoma / Q000209:etiology*; D001208:Asia; D001942:Breast Feeding; D001943:Breast Neoplasms / Q000209:etiology* / Q000235:genetics; D002277:Carcinoma / Q000209:etiology*; D003105:Colombia; D005060:Europe; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D009656:North America