1. Knight WA III, Livingston RB, Gregory EJ, McGuire WL: Estrogen receptor as an independent prognostic factor for early recurrence in breast cancer. Cancer Res 37: 4669–4671, 1977
2. Rich MA, Furmanski P, Brooks SC, and the Breast Cancer Prognostic Study Surgery and Pathology Associates: Prognostic value of estrogen receptor determinations in patients with breast cancer. Cancer Res 38: 4296–4298, 1978
3. Maynard PV, Blamey RW, Elston CW, Haybittle JC, Griffiths K: Estrogen receptor assay in primary breast cancer and early recurrence of the disease. Cancer Res 38: 4292–4295, 1978
4. Allegra JC, Lippman ME, Simon R, Thompson EB, Barlock A, Green L, Huff KK, Do HMT, Aitken SL, Warren R: Association between steroid hormone receptor status and disease free interval in breast cancer. Cancer Treat Rep 63: 1271–1277, 1979
5. Cooke T, George D, Shields R, Maynard P, Griffiths K: Oestrogen receptors and prognosis in early breast cancer. Lancet ii: 995–997, 1979