author        = "Bolíbar, B. and Pareja, C. and Astier-Peña, M.P. and
                       Morán, J. and Rodríguez-Blanco, T. and Rosell-Murphy, M.
                       and Iglesias, M. and Juncosa, S. and Mascort, J. and
                       Violan, C. and Magallón, R. and Apezteguia, J.",
      title         = "{Variability in the performance of preventive services and
                       in the degree of control of identified health problems: A
                       primary care study protocol}",
      year          = "2008",