Spontaneous feline mammary intraepithelial lesions as a model for human estrogen receptor- and progesterone receptor-negativebreast lesions. - Burrai, Giovanni P.; Mohammed, Sulma I.; Miller, Margaret A.; Marras, Vincenzo; Pirino, Salvatore; Addis, Maria F.; Uzzau, Sergio; Antuofermo, Elisabetta (BMC Cancer, 2010)