PeerJ Author 100 Points Contributions by role Author 100 Contributions by subject area Epidemiology Pediatrics Public Health Robinson Ramírez-Vélez PeerJ Author Summary Pediatrics PeerJ Contributions Articles 1 May 23, 2017 Construct validity and test–retest reliability of the International Fitness Scale (IFIS) in Colombian children and adolescents aged 9–17.9 years: the FUPRECOL study Robinson Ramírez-Vélez, Sandra Milena Cruz-Salazar, Myriam Martínez, Eduardo L. Cadore, Alicia M. Alonso-Martinez, Jorge E. Correa-Bautista, Mikel Izquierdo, Francisco B. Ortega, Antonio García-Hermoso https://doi.org/10.7717/peerj.3351 PubMed 28560104