Auckland City Hospital, Auckland, New Zealand
University of Alabama Birmingham, Birmingham, Alabama, United States
University of Chicago, Chicago, Illinois, United States
Massachusetts General Hospital, Boston, Massachusetts, United States
ETZ Elisabeth, Tilburg, Netherlands
Rijnstate Hospital, Arnhem, Gelderland, Netherlands
Dijklander Ziekenhuis, Hoorn, Noord-Holland, Netherlands
Auckland City Hospital, Auckland, New Zealand
Waikato Hospital, Hamilton, New Zealand
Universitätsklinikum Heidelberg, Heidelberg, Germany
Klinikum Nürnberg, Nürnberg, Germany
Universitätsklinikum Carl-Gustav-Carus an der Technischen Universität Dresden, Dresden, Germany
Hospital ClÃnico Regional Guillermo Grant Benavente, Concepción, Chile
Instituto de NeurocirugÃa, Santiago, Chile