A Córdoba1, M Lisa1, J Gómez-Román2, J L Hernández3. 1. From the Department of Internal Medicine, Hospital Marqués de Valdecilla-IDIVAL, University of Cantabria, Santander, Spain. 2. Department of Pathology, Hospital Marqués de Valdecilla-IDIVAL, University of Cantabria, Santander, Spain. 3. From the Department of Internal Medicine, Hospital Marqués de Valdecilla-IDIVAL, University of Cantabria, Santander, Spain hernandezjluis@gmail.com.