1. Postgraduate School of Cardiorespiratory Physiopathology, University of Roma, Italy.
2. Department of Experimental Medicine, University of L'Aquila, and Department of Cellular and Developmental Biology, University La Sapienza, Roma, Italy.
3. Institute of Tuberculosis and Respiratory Diseases, University of Modena, USL 16 Modena and Postgraduate School of Cardiorespiratory Physiopathology, Universities of Roma and Modena, Italy.