[1] McMaster Univ, Hamilton, ON, Canada
[2] Amer Univ Beirut, Beirut, Lebanon
[3] Univ Ottawa, Ottawa, ON, Canada
[4] Univ Barcelona, Barcelona, Spain
[5] Insubria Univ, Insubria, Italy
[6] Cornell Univ, Weill Med Coll, New York, NY 10021 USA
[7] Barcelona Hosp Clin, Barcelona, Spain
[8] Kings Coll London, London, England
[9] Univ Freiburg, Freiburg, Germany
[10] Hamilton Hlth Sci, Hamilton, ON, Canada
[11] Nationwide Childrens, Columbus, OH USA
[12] Univ Padua, Padua, Italy
[13] NY Presbyterian Hosp, New York, NY USA