[1] Univ Bologna, Bologna, Italy
[2] Univ Bologna, Seragnoli Dept, Bologna, Italy
[3] Univ Bologna, GIST Study Grp, Bologna, Italy
[4] Interdept Ctr Canc Res, Bologna, Italy
[5] Portland VA Med Ctr, Portland, OR USA
[6] Oregon Hlth & Sci Univ, Knight Canc Inst, Portland, OR 97201 USA
[7] Univ Bologna, S Orsola Malpighi Hosp, Emergency Surg & Transplant Dept, Bologna, Italy
[8] St Orsola Marcello Malpighi Hosp, Pathol Unit, Bologna, Italy