This is for anybody that has an interview at Boston or Tufts. I cancelled my Jan 13 interview at BU and my Jan 14 interview at Tufts, so if you want to move up your own interview now is your chance.
I called the phone number given to me in the interview invite e-mail. The lady was very sincere about it and did not even question me on why I was canceling. Supposedly I even get a confirmation e-mail after I cancel as well.