[1] Umea Univ, Inst Clin Neurosci, SE-90185 Umea, Sweden
[2] Univ Edinburgh, Edinburgh, Midlothian, Scotland
[3] Univ Lausanne, Ctr Hosp Univ Vaudois, Lausanne, Switzerland
[4] Hosp Santa Maria, Lisbon, Portugal
[5] Univ Turin, Turin, Italy
[6] Univ Leuven, Louvain, Belgium
[7] Trinity Coll Dublin, Dublin, Ireland
[8] Hannover Med Sch, Hannover, Germany
[9] Hop La Pitie Salpetriere, Paris, France
[10] Univ Milan, Sch Med, Milan, Italy
[11] Jagiellonian Univ, Coll Med, Krakow, Poland
[12] Munich Univ Hosp, Munich, Germany
[13] Univ Basel Hosp, CH-4031 Basel, Switzerland
[14] San Giovanni Hosp, Turin, Italy
[15] VIB, Louvain, Belgium
[16] Beaumont Hosp, Dublin 9, Ireland
[17] Univ Birmingham, Sch Clin & Expt Med, Birmingham, W Midlands, England
[18] Queen Elizabeth Hosp, Birmingham B15 2TH, W Midlands, England
[19] Kantonsspital St Gallen, Basel, Switzerland