Comparison of PD-L1 protein expression between primary tumors and metastatic lesions in triple negative breast cancers
======================================================================================================================

* Mariya Rozenblit
* Richard Huang
* Natalie Danziger
* Priti Hegde
* Brian Alexander
* Shakti Ramkissoon
* Kim Blenman
* Jeffrey S Ross
* David L Rimm
* Lajos Pusztai