Figure 1.

Caliper growth follow-up measurements. MC7-L1 ER+ (a) and ERαKD (b) tumor growth were measured under fulvestrant, letrozole, or tamoxifen therapy, or no treatment (control). Measurements were done at 0, 7, and 14 days following the same time points as the imaging protocol (n = 5 for each group). Asterisk denotes p < 0.05; double asterisk, p < 0.01.