1. Diagnostic and Interventional Ultrasound UnitValle del Serchio General Hospital Lucca Italy
2. Pulmonary Medicine Unit, Department of Cardiovascular and Thoracic SciencesFondazione Policlinico Universitario Agostino Gemelli, Istituto di Ricovero e Cura a Carattere Scientifico Rome Italy
3. Department of Woman and Child Health and Public HealthFondazione Policlinico Universitario Agostino Gemelli, Istituto di Ricovero e Cura a Carattere Scientifico Rome Italy
4. Emergency Department, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico, Policlinico San Matteo, and Department of Internal Medicine and TherapeuticsUniversity of Pavia Pavia Italy
5. Bresciamed Brescia Italy
6. Unità Sabutaria Locale 118 Nordovest Toscana Lucca Italy
7. Emergency Medicine Unit, General Hospital Voghera Italy
8. Pulmonary Medicine UnitLodi General Hospital Lodi Italy
9. Department of Information Engineering and Computer Science, Ultrasound Laboratory TrentoUniversity of Trento Trento Italy