“…The general characteristics of the 14 selected studies ( n = 1234) are shown in Table . While 3 studies (Alves et al, ; Lee et al, ; Thomas et al, ) were published since 2000, most studies were published before 2000 (Agbolosu et al, ; Aksoylar et al, ; Brandts, Ndjave, Grainger, & Kremsner, ; Friedman & Barton, ; Hunter, ; Kang et al, ; Kinmonth, Fulton, & Campbell, ; Mahar, 1994; Newman, ; Sharber, ; Steele et al, ). While 2 studies were conducted in the United States (Friedman & Barton, ; Sharber, ), 2 studies (Kang et al, ; Lee et al, ) were conducted in the Republic of Korea; a single study was conducted in Australia, Brazil, Canada, Gabon, Hawaii, India, Malawi, Thailand, Turkey, and the United Kingdom (Agbolosu et al, ; Aksoylar et al, ; Alves et al, ; Brandts et al, ; Hunter, ; Kinmonth et al, ; Mahar, 1994; Newman, ; Steele et al, ; Thomas et al, ).…”