[1] Cleveland Clin, Cleveland, OH 44106 USA
[2] VA Med Ctr, Minneapolis, MN USA
[3] ECLA, Rosario, Argentina
[4] ANMCO, Res Ctr, Florence, Italy
[5] Univ Glasgow, Western Infirm, Glasgow G11 6NT, Lanark, Scotland
[6] Duke Univ, Med Ctr, Durham, NC USA
[7] Brigham & Womens Hosp, Boston, MA 02115 USA
[8] L Warynski Silesian Med Acad, Katowice, Poland
[9] Univ Groningen, Univ Med Ctr, Groningen, Netherlands
[10] Amgen Inc, Clin Dev, Thousand Oaks, CA 91320 USA
[11] Sahlgrenska U Hosp, Gothenburg, Sweden