2 Department of Basic Clinical Practice, School of Medicine, Universitat de Barcelona, Barcelona, Spain. anadal@clinic.cat.
3 August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain. anadal@clinic.cat.
4 Pathology Department, Hospital Universitari Vall d'Hebron, Department of Morphological Sciences, School of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain.