Antonio Zapatero, Raquel Barba*, Jesús Canora, Juan E Losa, Susana Plaza, Jesús San Roman and Javier Marco
* Corresponding author: Raquel Barba raquel.barba@hospitalreyjuancarlos.es
BMC Musculoskeletal Disorders 2013, 14:15 doi:10.1186/1471-2474-14-15