Journal article (2012) - G Schutgens (author), I. W.M. Pothof (author), I. W M Pothof (author), I. Pothof (author), I.W.M. Pothof (author), Ivo Pothof (author), M Voogt (author), Francois H.L.R. Clemens (author), François H.L.R. Clemens (author), Francois Clemens (author), François H L R Clemens (author), F. H.L.R. Clemens (author), F.H.L.R. Clemens (author), F. H L R Clemens (author), François Clemens (author)