Depends on if an oncologist does any off label treatments. The clinical data from years of cancer patients on Metformin and the indications that it affects cancer stem cells seems to suggest a move forward with an existing, low toxicity element.
The SABC anouncement with Gradishar and Chang reported on an early trial.
Some other trial based CSC info:
http://her2support.org/vbulletin/sho...ent#post199408
Who was the presenter who didn't show up?