1 Department of Thoracic Surgery, Hospital Universitari de Bellvitge, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, Barcelona, Spain; Unit of Human Anatomy, Department of Pathology and Experimental Therapeutics, Medical School, University of Barcelona, Barcelona, Spain. Electronic address: ricardramos@ub.edu.
2 Department of Thoracic Surgery, Hospital Universitari de Bellvitge, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, Barcelona, Spain.
3 Department of Thoracic Surgery, Hospital Universitari de Bellvitge, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, Barcelona, Spain; Unit of Human Anatomy, Department of Pathology and Experimental Therapeutics, Medical School, University of Barcelona, Barcelona, Spain.