Dr Dre - I Need A Doctor chords

Dr. Dre ft. Eminem, Skylar Grey
[ Tab from: http://www.guitaretab.com/d/dr-dre/266034.html ]
Bm                  G
Im about to lose my mind
                         A
you've been gone for so long
                    A
I'm running out of time
           G
I need a doctor
            G
call me a doctor
          F#
I need a doctor, doctor
                    Bm
to bring me back to life