Variability in the performance of preventive services and in the degree of control of identified health problems: A primary care study protocol
Bonaventura Bolíbar*, Clara Pareja, M Pilar Astier-Peña, Julio Morán, Teresa Rodríguez-Blanco, Magdalena Rosell-Murphy, Manuel Iglesias, Sebastián Juncosa, Juanjo Mascort, Concepció Violan, Rosa Magallón and Javier Apezteguia