Azami A, Madani SH, Khazaei S, Izadi B, Saleh E, Sajadimajd S. Survey of low ER-positive expression and its correlation with other clinical and pathological factors in breast cancer. Indian J Pathol Microbiol. 2020 Feb;63(Supplement):S129–33. doi: 10.4103/ijpm.ijpm_255_17. PMID: 32108645.