Heterogeneity of soluble and nuclear oestrogen receptor status of involved nodes in relation to primary breast cancer Castagnetta, L.; Traina, A.; Dicarlo, A.; Latteri, A.M.; Carruba, G.; Leake, R.E. European Journal of Cancer and Clinical Oncology 23(1): 31-35 1987 0277-5379 10.1016/0277-5379(87)90415-9 https://eurekamag.com/research/070/197/070197510.php