[1] Leiden Univ, Leiden, Netherlands
[2] Dutch Fdn Deaf & Hard Hearing Child, Amsterdam, Netherlands
[3] Univ Evora, Dept Desporto & Saude, Escola Saude & Dev Humano, Evora, Portugal
[4] Univ Evora, Comprehens Hlth Res Ctr CHrC, Evora, Portugal
[5] Univ Twente, Enschede, Netherlands
[6] UCL, London, England