Affiliation: | aDepartment of Internal Medicine, Hospital U.M. Valdecilla-IFIMAV, University of Cantabria, Santander, Spain;bHistology and Immunohistochemistry Unit, Centro Nacional de Investigaciones Oncológicas (CNIO), Madrid, Spain;cService of Traumatology and Orthopedic Surgery, Hospital U.M. Valdecilla, Santander, Spain |