1. Diagnostic and Interventional Ultrasound UnitValle del Serchio General Hospital Lucca Italy
2. Pulmonary Medicine UnitDepartment of Cardiovascular and Thoracic Sciences Scientifico Rome Italy
3. Department of Woman and Child Health and Public Health Scientifico Rome Italy
4. Fondazione Policlinico Universitario Agostino GemelliIstituto di Ricovero e Cura a Carattere Scientifico Rome Italy
5. Emergency Department, Fondazione Policlinico San Matteo, Istituto di Ricovero e Cura a Carattere Scientifico, and Department of Internal Medicine and TherapeuticsUniversity of Pavia Pavia Italy
6. Bresciamed Brescia Italy
7. Unità Sanitaria Locale 7118 Nordovest Toscana Lucca Italy
8. Emergency Medicine UnitGeneral Hospital Voghera Italy
9. Pulmonary Medicine UnitLodi General Hospital Lodi Italy
10. Department of Information Engineering and Computer ScienceUltrasound Laboratory Trento, University of Trento Trento Italy