@Article{ Rivas-Ruiz_EXPÓSITO,

author = { Francisco Rivas-Ruiz and MANUELA EXPÓSITO RUIZ } ,

title = { Research designs in clinical epidemiology },

journal = { Allergologia et Immunopathologia },

year = { 2012 },

pages = { - },

doi = { http://www.ncbi.nlm.nih.gov/pubmed/22284831 },

}