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2   Table S1: Status of IHC markers in basal and non-basal tumors  
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4   IHC marker Total (N=351) Non-basal (N=64) Basal (N=283)  
5   CK5 IHC        
6   Informative 331 (94%) 53 (82.8%) 278 (98.2%)  
7   Negative 94 (28.4%) 53 (100%) 41 (14.7%)  
8   Positive 237 (71.6%) 0 (0.0%) 237 (85.3%)  
9   EGFR IHC        
10   Informative 346 (98.3%) 63 (98.4%) 283 (100%)  
11   Negative 161 (46.5%) 63 (100%) 98 (34.6%)  
12   Positive 185 (53.5%) 0 (0.0%) 185 (65.4%)  
13   p53 IHC        
14   Informative 307 (87.5%) 47 (73.4%) 260 (91.9%)  
15   Negative 125 (40.7%) 27 (57.4%) 98 (37.7%)  
16   Positive 182 (59.3%) 20 (42.6%) 162 (62.3%)  
17   p53/EGFR IHC (4 scale)        
18   Informative 306 (86.9%) 46 (71.9%) 260 (91.8%)  
19   Both negative 64 (20.9%) 27 (58.7%) 37 (14.2%)  
20   Both positive 110 (35.9%) 0 (0.0%) 110 (42.3%)  
21   p53 negative and EGFR positive 61 (14.3%) 0 (0.0%) 61 (23.5%)  
22   p53 positive and EGFR negative 71 (23.2%) 19 (41.3%) 52 (20.0%)  
23   Ki67 (continuous)        
24   Informative 317 (90.3%) 49 (76.6%) 268 (94.7%)  
25   Median 46.5 11 52.3  
26   Range 0-100 0-100 0-100  
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