[1] Univ A Coruna, Unidade Invest Saude & Podoloxia, Dept Ciencias Saude, Fac Enfermarla & Podoloxia, Ferrol 15403, Spain
[2] Univ Rey Juan Carlos, Fac Ciencias Salud, Madrid, Spain
[3] Univ Complutense Madrid, Escuela Univ Enfermeria, Fisioterapia & Podol Fac Med, E-28040 Madrid, Spain