1 Thoracic Surgery and Interventional Pulmonology, Swedish Cancer Institute, Seattle, WA, USA.
2 Center for Lung Cancer Research in Honor of Wayne Gittinger, Seattle, WA, USA.
3 Pleural Medicine Unit, Dept of Internal Medicine, Arnau de Vilanova University Hospital, IRBLleida, University of Lleida, Lleida, Spain jporcelp@yahoo.es.