PHYSIOTHERAPY AND BACK SCHOOLS IN PRIVATE CENTERS IN ZARAGOZA (A. Fabios Gonzalez, E. Estebanez de Miguel, S. Caudevilla Polo, C. HidalgO Garcia, O. Lucha L6peZ, & J. M. TricaS Moreno , Trans.). (2002). Cuestiones De Fisioterapia, 21(1), 81-86. https://cuestionesdefisioterapia.com/index.php/es/article/view/433