[1] Univ Calif San Francisco, San Francisco, CA 94143 USA
[2] Ctr Rene Gauducheau, St Herblain, France
[3] Morgagni Pierantoni Hosp, Forli, Italy
[4] Christie Hosp, Manchester, Lancs, England
[5] Ist Sci San Raffaele, Milan, Italy
[6] Univ Modena, Univ Hosp, I-41100 Modena, Italy
[7] Bristol Myers Squibb Co, Wallingford, CT 06492 USA
[8] Univ Hosp Besancon, Besancon, France