“…Among the 15 studies meeting the inclusion criteria for this review, 10 were RCTs (Abedini et al, 2020; Bagherzadeh et al, 2021; Baucom et al, 2009; Esplen et al, 2018; Fatehi et al, 2019; Hummel et al, 2017; Nicolaisen et al, 2018; Reese et al, 2019; Rowland et al, 2009; Zangeneh et al, 2019), and five were quasi‐experimental trials (de Almeida et al, 2020; Faghani & Ghaffari, 2016; Jalambadani et al, 2018; Jun et al, 2011; Shayan et al, 2017). More than half of the studies were conducted in low‐income or middle‐income countries ( n = 8): seven in Iran (Abedini et al, 2020; Bagherzadeh et al, 2021; Faghani & Ghaffari, 2016; Fatehi et al, 2019; Jalambadani et al, 2018; Shayan et al, 2017; Zangeneh et al, 2019) and one in Brazil (de Almeida et al, 2020). Seven studies were carried out in high‐income countries, three in the United States (Baucom et al, 2009; Reese et al, 2019; Rowland et al, 2009), one in the Netherlands (Hummel et al, 2017), one in Canada (Esplen et al, 2018), Korea (Jun et al, 2011) and Denmark (Nicolaisen et al, 2018).…”