1. From the Fondazione Istituto Di Ricovero e Cura a Carattere Scientifico, Istituto Nazionale Tumori, Milan; Ospedale Regionale, Parma, Italy; Vall d'Hebron University Hospital, Barcelona, Spain; Tampere University Hospital, Tampere, Finland; Western General Hospital, Edinburgh; Mount Vernon Cancer Centre, Middlesex; Christie Hospital, Manchester, United Kingdom; Clinique Sainte-Elisabeth, Namur, Belgium; F. Hoffmann-La Roche, Basel, Switzerland.