Capo in the 3rd fret.(during Grammy Awards 2011 performance)
Capo in the 4th fret.(in original song)


Em                  C
Im about to lose my mind
                         D
you've been gone for so long
                    D
I'm running out of time
           C
I need a doctor
            C
call me a doctor
          B
I need a doctor, doctor
                    Em
to bring me back to life