[1] Johannes Gutenberg Univ Mainz, Klin & Poliklin Radiol, D-55131 Mainz, Germany
[2] Nycomed Amersham Buchler, Munich, Germany
[3] Univ Erlangen Nurnberg, Erlangen, Germany
[4] Clin Univ St Luc, Brussels, Belgium
[5] Hop Erasme, Brussels, Belgium
[6] Tech Univ Dresden, D-8027 Dresden, Germany
[7] Univ Cologne, Cologne, Germany
[8] Kings Coll Hosp London, London, England
[9] Queen Elizabeth Hosp, Birmingham B15 2TH, W Midlands, England
[10] Hop de LArchet, Dept Imagerie Med, Nice, France
[11] Ctr Hosp Reg & Univ Caen, Caen, France
[12] Ctr Hosp Reg Univ Lille, Lille, France
[13] Hosp Univ Doctor Peset, Valencia, Spain