[1] Mayo Clin, Rochester, MN USA
[2] Univ Hosp Gasthuisberg, B-3000 Leuven, Belgium
[3] Univ Hosp Vienna, Vienna, Austria
[4] Mt Sinai Med Ctr, New York, NY 10029 USA
[5] Imelda Ziekenhuis, Bonheiden, Belgium
[6] Erasmus MC, Rotterdam, Netherlands
[7] Centocor Inc, Horsham, PA USA
[8] CHU Lille, F-59037 Lille, France