borderline significantp = 0.07
Nine independent experiments with TPTA-Gd (5 μM) augmented the T1-relaxation rate in ER-positive cells by a mean ± SD of 72 ± 6 ms −1 and in ER-negative cells by 64 ± 10 ms −1 with a borderline significant difference between the cells ( p = 0.07, n = 9).