Journal article (2013) - K. Lekkerkerker (author), AH knol (author), JG Derks (author), MB Heringa (author), C. Houtman (author), CHM Hofman-Caris (author), EF Beerendonk (author), A Reus (author), J.Q.J.C. Verberk (author), J.C. van Dijk (author)