Eminem - I Need A Doctor chords

Play this chords for the whole song.
Have fun! 


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

[ Tab from: http://www.guitaretab.com/e/eminem/263933.html ]
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