Authors: Sergio Paredes-Solís; Ascensio Villegas-Arrizón; Robert J Ledogar; Verónica Delabra-Jardón; José Alvarez-Chávez; José Legorreta-Soberanis; Elizabeth Nava-Aguilera; Anne Cockcroft; Neil Andersson Journal: BMC Health Serv Res Date: 2011-12-21 Impact factor: 2.655