Records identified through database searching (n = 180)

Additional records identified through other sources (n = 22)





Records after duplicates were removed (n = 175)





Records screened (n = 175)



Records excluded on screening (n = 45)



Full Text articles assessed for eligibility (n = 130)



Full Text articles excluded with reasons (n = 45)



Studies included in the descriptive analysis (n = 130)