Participants ( n = @ ) were matched in pairs and randomized to intervention ( Mitii for @wks ; @ males , mean age @y @mo -LSB- @y @mo -RSB- , Manual Ability Classification System level I = @ , II = @ , III = @ ) or control ( standard care ; @ males , mean age @y @mo -LSB- @y @mo -RSB- , Manual Ability Classification System level I = @ , II = @ ) .