“…Fourteen articles were reported as cross-sectional studies (Abdel-Hamid, Hakim, Elokda, & Mostafa, 2013;Azuma, Ikeda, Kagi, Yanagi, & Osawa, 2015;Brasche et al, 2004;Glas, Levin, Stenberg, Stenlund, & Sunesson, 2004;Jaakkola, Yang, Ieromnimon, & Jaakkola, 2007;Jung, Liang, Lee, Hsu, & Su, 2014;Kubo et al, 2006;Lim et al, 2015;Lu, Lin, Chen, & Chen, 2015a;Lu et al, 2007;Mendell, Lei-Gomez, Mirer, Seppänen, & Brunner, 2008;Reijula & Sundman-Digert, 2004;Skyberg et al, 2003), three were longitudinal studies (Azuma, Ikeda, Kagi, Yanagi, & Osawa, 2017;Mizoue, Andersson, Reijula, & Fedeli, 2004;Tsai et al, 2012), two were case-control studies (Glas, Stenberg, Stenlund, & Sunesson, 2008, one was a cohort study (Neuner & Seidel, 2006), one was a case report (Nakazawa et al, 2005), one was a systematic review together with epidemiological modelling (Fisk, Mirer, & Mendell, 2009), and one was a cost-benefit study (Fisk, Black, & Brunner, 2011).…”