1. Hospital Angeles Tijuana, México
2. UMAE “Dr. Victorio de la Fuente Narvaez”, México
3. Hospital Ángeles Universidad, México
4. The Brain and Spine Care, Minimally Invasive Spine Surgery Group, México
5. Hospital Médica Sur, México
6. The American-British Cowdray Medical Center I.A.P. Santa Fe Campus, México
7. Arabella Klinik, Germany
8. Boston University School of Medicine, USA
9. Vanderbilt University Medical Center, USA
10. CEMA, México
11. Center for Advanced Spine Care of Southern Arizona, USA; Fundación Universitaria Sanitas Bogotá, Colombia; Colombian Academy of Medicine, Colombia; Hospital Universitário Gaffree Guinle, Brazil; Universidade Federal do Estado do Rio de Janeiro, Brazil; Brazilian Military Medical Academy, Brazil