Surgery, School of Medicine, Creighton University
Barrow Neurological Institute (United States, Phoenix)
St. Joseph's Hospital and Medical Center (United States, Phoenix)
Weill Cornell Medicine (United States, New York)
Irkutsk Scientific Center of Surgery and Traumatology (Russia, Irkutsk) - INTSHT
Universidade Federal de Minas Gerais (Brazil, Belo Horizonte) - UFMG
Montreal Neurological Institute and Hospital (Canada, Montreal) - MNI
McGill University (Canada, Montreal)