1. Jemal A, Bray F, Center MM, Ferlay J, Ward E, Forman D (2011) Global cancer statistics. CA Cancer J Clin 61:69–90
2. Harford JB (2011) Breast-cancer early detection in low-income and middle-income countries: do what you can versus one size fits all. Lancet Oncol 12:306–312
3. MacMahon B, Cole P, Lin TM, Lowe CR, Mirra AP, Ravnihar B, Salber EJ, Valaoras VG, Yuasa S (1970) Age at first birth and breast cancer risk. Bull World Health Organ 43:209–221
4. Hinkula M, Pukkala E, Kyyronen P, Kauppila A (2001) Grand multiparity and the risk of breast cancer: population-based study in Finland. Cancer Causes Control 12:491–500
5. Yang XR, Chang-Claude J, Goode EL, Couch FJ, Nevanlinna H, Milne RL, Gaudet M, Schmidt MK, Broeks A, Cox A, Fasching PA, Hein R et al (2011) Associations of breast cancer risk factors with tumor subtypes: a pooled analysis from the Breast Cancer Association Consortium studies. J Natl Cancer Inst 103:250–263