Primary Health Care Research Unit, The Alamedilla Health Center, Castilla and León Health Service (SACYL), Biomedical Research Institute of Salamanca (IBSAL), Salamanca, Spain
Department of Medicine, University of Salamanca, Salamanca, Spain
Department of Statistics, University of Salamanca, Salamanca, Spain
Department of Nursing and Physiotherapy, University of Salamanca, Salamanca, Spain
Primary Health Care Research Unit of Barcelona, Primary Healthcare University Research Institute IDIAP-Jordi Gol, Barcelona, Spain
Torre Ramona Health Center, Aragón Health Service, Zaragoza, Spain
Casa de Barco Health Center, Castilla y León Health Service, Valladolid, Spain
Primary Care Research Unit of Bizkaia, Basque Health Service-Osakidetza, Bilbao, Spain
Río Tajo Health Center, Castilla-La Mancha Health Service. University of Castilla-La Mancha, Talavera de la Reina, Spain
Biomedical and Diagnostic Sciences Department, University of Salamanca, Salamanca, Spain
EVIDENT Investigators, redIAPP: Spanish Research Network for Preventive Activities and Health Promotion in Primary Care, Salamanca, Spain
Manuel A Gomez-Marcos, Unidad de Investigación, Centro de Salud La Alamedilla, Salamanca 37003, Spain. Email: [email protected]
† Authors contributed equally
Received September 26, 2017
Received in revised form February 03, 2018
Accepted February 06, 2018
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