Journal article (2012) - Andrea Illiberi (author), PJPM Simons (author), AC Janssen (author), EHA Beckers (author), B Kniknie (author), J van Deelen (author), M.J. Theelen (author), M Zeman (author), M. Tijssen (author), W Zijlmans (author), HLAH Steijvers (author), D Habets (author)