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document
Meeuse, F.M. (author), De Deugd, R.M. (author), Kapteijn, F. (author), Verheijen, P.J.T. (author), Ypma, S.M. (author)
journal article 2001
document
Meeuse, F.M. (author), Grievink, J. (author), Verheijen, P.J.T. (author), Vander Stappen, M.L.M. (author)
journal article 1999