I cannot create a summary of the requested article because the search results provided do not include an article titled "STAT+: Cancer cells can 'barf' proteins onto their cell surface." The available results only contain a Czech diploma thesis on apoptotic markers in breast tumors from 2018, which deals with a completely different topic. In order to create an accurate and factual summary as per your requirements, I need access to the full text of the STAT+ article you provided.