[1] Royal Marsden NHS Fdn Trust, Sutton, Surrey, England
[2] CancerCare Manitoba, Winnipeg, MB, Canada
[3] Imelda GI Clin Res Ctr, Bonheiden, Belgium
[4] Ctr Rene Gauducheau, St Herblain, France
[5] AstraZeneca, Macclesfield, Cheshire, England
[6] Univ Hosp Gasthuisberg, B-3000 Louvain, Belgium