Table 1.

Search strategies by databases, conducted on April, 2017.

Database	Query	Items found
Medline (via PubMed)	Search ((((Schizophren*[Title/Abstract]) OR "dementia praecox"[Title/Abstract]) OR "Schizophrenia"[Mesh])) AND ((((Relax*[Title/Abstract]) OR "Relaxation"[Mesh]) OR "Relaxation Therapy"[Mesh]) OR "Muscle Relaxation"[Mesh]) Filters: English; French; Italian; Portuguese; Spanish	416
CINAHL (via EBSCO)	(TI schizophren* OR AB schizophren*) OR (TI "dementia praecox" OR AB "dementia praecox") OR (TI relax* OR AB relax*) OR (MH "Relaxation") OR (MH "Muscle Relaxation") OR (MH "Simple Relaxation Therapy (Iowa NIC)") OR (MH "Relaxation Techniques+") OR (MH "Progressive Muscle Relaxation (Iowa NIC)") OR (MH "Schizophrenia+") Limiters - Language: English, French, Italian, Portuguese, Spanish	111
Directory of Open Access Journals (DOAJ)	Article: Abstract (Schizophren* AND relax*)	13
ERIC	(TI schizophren* OR AB schizophren*) OR (TI "dementia praecox" OR AB "dementia praecox") OR (TI relax* OR AB relax*)	3
PsycNET - PsycARTICLES	((Title:(Relax*)) OR (Abstract:(Relax*))) AND ((Title:(Schizophren*)) OR (Abstract:(Schizophren*)) OR (Title:("dementia praecox")) OR (Abstract:("dementia praecox")))	10
Scielo Citation Index	(Title: (schizophren*) OR Topic: (schizophren*)) AND (Title: (relax*) OR Topic: (relax*))	3
The Cochrane Library	((Schizophren*:ti,ab,kw) OR ("dementia praecox":ti,ab,kw) OR (MeSH descriptor: [Schizophrenia])) AND ((Relax*:ti,ab,kw) OR (MeSH descriptor: [Relaxation]) OR (MeSH descriptor: [Relaxation Therapy]) OR (MeSH descriptor: [Muscle Relaxation])	48
Embase	'dementia praecox':ab,ti OR schizophren*:ab,ti OR 'schizophrenia'/exp AND (relax*:ab,ti OR 'relaxation training'/exp OR 'muscle relaxation'/exp)	537
PEDro	Abstract and Title (schizophren* AND relax*)	16
CAPES	Schizophren* AND Relax*	4
RCAAP – Scientific Open Access Repository of Portugal	Description (schizophren* AND relax*)	11
	total	1172