Published on in Vol 17 , No 9 (2015) :September

1 St John Providence Hospital , Detroit , MI , US
2 Duke University and Durham VA Medical Centers , Durham , NC , US
3 Arcispedale Santa Maria Nuova, IRCCS , Reggio Emilia , IT
4 University of Illinois at Chicago/ Advocate Christ Medical Center , Oak Lawn , IL , US
5 Imperial College , London , GB
6 Royal Infirmary of Edinburgh , Edinburgh , GB
7 Ottawa Hospital Research Institute , Ottawa , ON , CA