Table 1. 3D spheroids were grown from breast cancer samples of varying stages and genetic backgrounds with an 87% success rate.

Features of tumor samples	Total number of samples	Number of successful samples
Tumor stage
I–II	4	4 (100%)
II	9	7 (78%)
II–III	4	4 (100%)
III	5	4 (80%)
N/A	9	8 (88%)
Total	31	27 (87%)
Genetic background
Triple negative	4	4 (100%)
Luminal A	11	10 (91%)
Luminal B1	10	8 (80%)
Luminal B2	4	3 (75%)
N/A	2	2 (100%)
Total	31	27 (87%)
Ki67
0–10%	17	15 (88%)
11–20%	6	6 (100%)
21–40%	3	3 (100%)
N/A	5	3 (60%)
Total	31	27 (87%)