[1] Hosp S Maria Misericordia, Perugia, Italy
[2] Univ Perugia, Dept Internal Med, I-06100 Perugia, Italy
[3] Jichi Med Sch, Mibu, Tochigi, Japan
[4] Tohoku Univ, Sch Med, Sendai, Miyagi 980, Japan
[5] Univ Hosp, Padua, Italy
[6] Univ Hosp, Chieti, Italy
[7] SUNY Stony Brook, New York, NY USA
[8] Baker Med Res Inst, Melbourne, Vic, Australia
[9] Columbia Univ, New York, NY USA