[1] Keele Univ, Keele, Staffs, England
[2] Cardiff Univ, Cardiff, Wales
[3] Univ Queensland, Brisbane, Qld, Australia
[4] Princess Paola Hosp, Marche En Famenne, Belgium
[5] Univ Liege, Liege, Belgium
[6] Univ Melbourne, Melbourne, Vic, Australia
[7] Aalborg Univ, Aalborg, Denmark
[8] Vanderbilt Univ, Med Ctr, Nashville, TN USA
[9] Univ Delaware, Newark, DE USA
[10] Univ Southern Denmark, Odense, Denmark
[11] Naestved Slagelse Ringsted Hosp, Odense, Denmark
[12] Univ North Carolina Chapel Hill, Chapel Hill, NC USA
[13] Univ Nebraska Med Ctr, Omaha, NE USA