Hanson Christy, Sotgiu Giovanni, Loddenkemper Robert
Institute for Global Citizenship, Macalester College, Saint Paul, MN, USA
Clinical Epidemiology and Medical Statistics Unit, Dept of Biomedical Sciences, University of Sassari, Research, Medical Education and Professional Development Unit, AOU Sassari, Sassari, Italy.
Eur Respir J. 2014 Jul;44(1):1-4. doi: 10.1183/09031936.00028514.