- Correspondence to Dr Susana García Gutiérrez, Unidad de Investigación, Red de Investigación en Servicios de Salud en Enfermedades Crónicas (REDISSEC), Hospital Galdakao-Usansolo, Barrio Labeaga s/n, Galdakao, Vizcaya 48960, Spain;
- Received October 18, 2012
- Revised January 8, 2013
- Accepted January 9, 2013
- First published February 28, 2013.
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