Table 1.

Stepwise inclusion and exclusion counts

2010-2016 MBC patients	0	2240
Exclude men	6	2234
Exclude patients younger than 18 years	2	2232
Exclude patients with non-TN MBC	829	1403
Exclude patients without histology or cytology confirmation	2	1401
Exclude patients whose tumor was not the first tumor	172	1229
Exclude patients with bilateral involvement	2	1227
Exclude patients without survival information/diagnosed by autopsy/death record only	81	1146
Final data set	0	1146