1Hole J, Hirsch M, Ball E, Meads C. Music as an aid for postoperative recovery in aduhs: a systematic review and meta- analysis. Lancet 2015 , http :// dx. doi. org/10. 1016/S01406736 ( 15 ) 601696.
2Glasziou P. Music in hospital. Lancet 2015, http://dx, doi. org/10. 1016/ S01406736 ( 15 ) 60640-7.