Table 1.

Example of PubMed search strategy

Number	Search terms
#1	‘Diabetes Mellitus’(MeSH)
#2	‘Depression’(MeSH) OR Depressions(Title/Abstract) OR Depressive Symptoms(Title/Abstract) OR Depressive Symptom(Title/Abstract) OR Symptom, Depressive(Title/Abstract) OR Symptoms, Depressive(Title/Abstract) OR Emotional Depression(Title/Abstract) OR Depression, Emotional(Title/Abstract) OR Depressions, Emotional(Title/Abstract) OR Emotional Depressions(Title/Abstract)
#3	‘Anxiety’(MeSH) OR Hypervigilance(Title/Abstract) OR Nervousness(Title/Abstract)
#4	#2 OR #3
#5	‘Music Therapy’(MeSH) OR Therapy, Music(Title/Abstract)
#6	‘Music’(MeSH) OR music intervention(Title/Abstract) OR music medicine(Title/Abstract) OR music listening(Title/Abstract) OR audio recording(Title/Abstract) OR mp3 hearing(Title/Abstract)
#7	‘Singing’(Mesh) OR sing(Title/Abstract) OR sings(Title/Abstract) OR song(Title/Abstract) OR compose(Title/Abstract) OR composing(Title/Abstract)
#8	#5 OR #6 OR #7
#9	randomised controlled trial (Publication Type) OR randomised(Title/Abstract) OR placebo(Title/Abstract)
#10	#1 AND #4 AND #8 AND #9