xxvi Marzia Simoni Pulmonary Environmental Epidemiology Unit Institute of Clinical Physiology National Research Council Pisa, Italy marzia_simoni@libero.it Gérald Simonneau National Reference Center for Pulmonary Hypertension Hôpital Antoine Béclère Paris, France France gerald.simonneau@abc.aphp.fr Giovanni Sotgiu Epidemiology and Medical Statistics Unit Department of Biomedical Sciences, University of Sassari Sassari, Italy gsotgiu@uniss.it Paolo Spagnolo Centre for Rare Lung Disease Dept of Medical and Surgical Sciences University of Modena and Reggio Emilia Modena, Italy paolo.spagnolo@unimore.it Antonio Spanevello Pneumology Unit, Fondazione Sal- vatore Maugeri, IRCCS Tradate, and Dept of Clinical and Experimental Medicine, University of Insubria, Varese, Italy antonio.spanevello@fsm.it Nick ten Hacken University Medical Center Groningen Groningen, the Netherlands n.h.t.ten.hacken@umcg.nl Einar Thorsen University of Bergen Bergen, Norway einar.thorsen@helse-bergen.no Pietro Torricelli Division of Radiology Dept of Diagnostic and Imaging Services University of Modena and Reggio Emilia Modena, Italy pietro.torricelli@unimore.it Thierry Troosters Respiratory Rehabilitation and Respiratory division, University Hospital Leuven, and Faculty of Kinesiology and Rehabilitation Sciences, Dept of Rehabilitation Sciences, KU Leuven Leuven, Belgium Thierry.Troosters@med.kuleuven.be Amanda Tufman Division of Respiratory Medicine and Thoracic Oncology, Hospitals of Ludwig-Maximilians-University, and Thoracic Oncology Centre of Munich Munich, Germany Amanda.Tufman@med.uni- muenchen.de Panagiota Tzani Department of Experimental and Clinical Medicine University of Parma Parma, Italy panagiotat@yahoo.com