Authors
Jan Koopman
Royal Dutch Visio, Centre of Expertise for Blind and Partially Sighted People, Rehabilitation & Advice, Amsterdam, The Netherlands
Marleen van Aartrijk
Anne Vrijling: Royal Dutch Visio, Centre of Expertise for Blind and Partially Sighted People, Rehabilitation & Advice, Haren, The Netherlands
Anne Cornelia Louisa Vrijling
Marleen van Aartrijk: Royal Dutch Visio, Centre of Expertise for Blind and Partially Sighted People, Rehabilitation & Advice, Eindhoven, The Netherlands