Accepted for Publication: April 5, 2012.
Published Online: November 12, 2012. doi:10.1001/jamaneurol.2013.591
Author Contributions:Study concept and design: Barros and Coutinho. Acquisition of data: Barros, Damásio, Tuna, Alves, and Coutinho. Analysis and interpretation of data: Barros, Damásio, Tuna, Silveira, Pereira-Monteiro, Sequeiros, Alonso, Sousa, and Coutinho. Drafting of the manuscript: Barros, Damásio, Sequeiros, Alonso, Sousa, and Coutinho. Critical revision of the manuscript for important intellectual content: Barros, Tuna, Alves, Silveira, Pereira-Monteiro, Sequeiros, Alonso, Sousa, and Coutinho. Statistical analysis: Sousa. Obtained funding: Barros, Silveira, Pereira-Monteiro, Sequeiros, Alonso, and Coutinho. Administrative, technical, and material support: Barros, Damásio, Tuna, and Alves. Study supervision: Barros and Coutinho.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by grants PRAXIS /P/SAU/13226/1998, POCTI/32643/ESP/2000, and PIC/IC/83232/2007 from the Fundação para a Ciência e Tecnologia, the Tecnifar award and grant from the Sociedade Portuguesa de Cefaleias, and the SPN award and grant from the Sociedade Portuguesa de Neurologia. Dr Alonso is funded by the Programa Ciência, POPH-QREN–Tipologia 4.2–Promoção do Emprego Científico, is cofunded by the European Social Fund, and has received national funds from the Ministério da Ciência e Ensino Superior.
Additional Contributions: Graça Fialho, PhD, and Helena Caria, PhD, Faculdade de Ciências, Universidade de Lisboa, performed the molecular study of congenital deafness, Teresa Gomes performed blood sampling, and Centro Hospitalar Póvoa de Varzim/Vila do Conde allowed the use of their facilities.