“…Hence, six publications with 125 participants (mostly children) fulfilled the inclusion criteria of the present review. Four publications were randomized, double-blind, cross-over, placebo-controlled trials (Coppola 2004;Hancock 2005;Goldberg-Stern 2012;Jain 2015), and two studies were randomized, double-blind, parallel, placebo-controlled trials (Gupta 2004a;Gupta 2004b). …”