The study was done an an accredited university and published in a reputable journal, but it was still (as the reports are saying) a study with inaccurate/tampered data.  If this latter part is true, it is a "bogus" study and the fact that it was from any particular university or published in any particular journal is irrelevent.

Any good university or researcher would pull such a study when the tampering came to light.  This is the right thing to have done.