Journal article (2005) - P Roepman (author), L.F.A. Wessels (author), M.J.T. Reinders (author), PJ Slootweg (author), FCP Holstege (author), N Kettelarij (author), P Kemmeren (author), AJ Miles (author), P Lijnzaad (author), MGJ Tilanus (author), R Koole (author), GJ Hordijk (author), P van der Vliet (author)