Journal article (2001) - RM van Guijt (author), E Baltussen (author), G van Dedem (author), G. van der Steen (author), H Frank (author), H Billiet (author), TGM Schalkhammer (author), FPJ Laugere (author), MJ Vellekoop (author), A Berthold (author), Pasqualina M Sarro (author)