"A 2009 systematic review and meta-analysis by Spreckley and Boyd of four 2000–2007 studies (involving a total of 76 children) came to different conclusions than the aforementioned reviews.
A 2009 systematic review and meta-analysis by Spreckley and Boyd of four 2000—2007 studies (involving a total of 76 children) came to different conclusions than the aforementioned reviews.