Dr André Castilho - Master in Health Sciences from UCS and Spine Surgeon at Mater Dei Network and Hospital UNIMED BH ContornoDr Henrique Darmstadter - Fellow in Spine Surgery at HC UFMG / Hospital Mater Dei / Hosítal UNIMED BH Contorno Dr Pedro Torres - Spine Surgeon at Hospital João XXII, UNIMED BH Contorno and São Francisco.