Percentiles and Principal Component Analysis of Physical Fitness From a Big Sample of Children and Adolescents Aged 6-18 Years: The DAFIS Project oleh Eliseo Iglesias-Soler, María Rúa-Alonso, Jessica Rial-Vázquez, Jose Ramón Lete-Lasa, Iván Clavel, Manuel A. Giráldez-García, Javier Rico-Díaz, Javier Rico-Díaz, Miguel Rodríguez-Del Corral, Eduardo Carballeira-Fernández, Xurxo Dopico-Calvo