Journal article (2008) - GH van Ramshorst (author) , JF Lange (author) , Richard Hendrik Goossens (author) , NL Agudelo (author) , GJ Kleinrensink (author) , M Verwaal (author) , SFJ Flipsen (author) , WCJ Hop (author) , L. S G L Wauben (author) , J Jeekel (author)