Published Online: May 27, 2013. doi:10.1001/jamainternmed.2013.6901.
Study concept and design: Vila-Corcoles and Ochoa-Gondar.
Acquisition of data: de Diego and Satue.
Analysis and interpretation of data: Vila-Corcoles, Ochoa-Gondar, and Rodriguez-Blanco.
Drafting of the manuscript: Vila-Corcoles, Ochoa-Gondar, de Diego, and Satue.
Critical revision of the manuscript for important intellectual content: Vila-Corcoles, Ochoa-Gondar, and Rodriguez-Blanco.
Statistical analysis: Rodriguez-Blanco.
Obtained funding: Vila-Corcoles and Ochoa-Gondar.
Administrative, technical, and material support: de Diego and Satue.
Study supervision: Vila-Corcoles and Ochoa-Gondar.
Conflict of Interest Disclosures: None reported.
Funding/Support: Funding for the study was provided by a grant from the “Fondo de Investigación Sanitaria” of the Instituto de Salud Carlos III (FIS 09/00043) of the Spanish Health Ministry.
EPIVAC (EPIdemiology and VACcinology) Study Group Members: The following persons, investigators of the EPIVAC Study Group, collaborated in this study: Frederic Gomez Bertomeu, MD, PhD, Xavier Raga Luria, MD, PhD, Empar Valdivieso López, NP, Elisabet Salsench Serrano, PhD, Cristina Torrente Fraga, MCS, Manel Jariod Pamies, MD, PhD, Beatriz Gonzalez Lamban, MS, Antonia Gutierrez Perez, PhD, and Angel Vila Rovira, MS.
Correction: This article was corrected on October 10, 2013, to correct the study group name.