Retraction of publications: a study of biomedical journals retracting publications based on impact factor and journal category Isabel Campos-Varela, Ramón Villaverde-Castañeda, Alberto Ruano-Raviña

Adherence to highly active antiretroviral therapy in Spain. A meta-analysis Carmen Ortego, Tania Bibiana Huedo-Medina, Javier Vejo, Francisco Javier Llorca

Gender influence in the quantity of drugs used in primary care José Sanfélix, Vicente Palop, Inmaculada Pereiró, Elena Rubio, Victoria Gosalbes, Inocencia Martínez-Mir