Journal article (2003) - CC Pain (author), MD Eaton (author), T.H.J.J. van der Hagen (author), D. Lathouwers (author), JLMA Gomes (author), CRE de Oliveira (author), AP Umpleby (author), K Ziver (author), RT Ackroyd (author), B Miles (author), AJH Goddard (author), H. van Dam (author)