Study	Reason for exclusion
Baker 2007	Wrong study design: not randomised controlled trial
Bibb 2018	Wrong study design: not randomised controlled trial
Chandrasekar 2020	Wrong intervention: use of music not qualifying as music therapy
Dingle 2008	Wrong study design: not randomised controlled trial
Gallant 1997	Wrong intervention: use of music not qualifying as music therapy
Gardstrom 2013	Wrong study design: not randomised controlled trial
Haddock 2003	Wrong intervention: intervention did not include music
Hammer 1996	Wrong participant population: mix of patients and staff
Howard 1997	Wrong study design: not randomised controlled trial
Jones 2005	Wrong comparator: lacked relevant control group
Lu 2005	Wrong intervention: use of music not qualifying as music therapy
Malcolm 2002	Wrong intervention: used combination of therapies
Mathis 2017	Wrong intervention: use of music not qualifying as music therapy
Moe 2011	Wrong study design: not randomised controlled trial
Murphy 2015	Wrong study design: not randomised controlled trial
Oklan 2014	Wrong study design: not randomised controlled trial
Sewak 2018	Wrong intervention: use of music not qualifying as music therapy
Silverman 2016c	Wrong patient population: psychiatric patients not diagnosed with substance use disorders
Stamou 2016	Wrong intervention: use of music not qualifying as music therapy
Stamou 2017	Wrong intervention: use of music not qualifying as music therapy
Taylor 2005	Wrong study design: not randomised controlled study
Wheeler 1985	Wrong study design: not randomised controlled study