1. Diagnostic and Interventional Ultrasound Unit Valle del Serchio General Hospital Lucca Italy
2. Pulmonary Medicine Unit, Department of Cardiovascular and Thoracic Sciences Fondazione Policlinico Universitario Agostino Gemelli, Istituto di Ricovero e Cura a Carattere Scientifico Rome Italy
3. Department of Woman and Child Health and Public Health Fondazione 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 Therapeutics University of Pavia Pavia Italy
5. Bresciamed Brescia Italy
6. 7118 USL Nordovest Toscana Lucca Italy
7. Emergency Medicine Unit, General Hospital Voghera Italy
8. Pulmonary Medicine Unit, Lodi General Hospital Lodi Italy
9. Department of Information Engineering and Computer Science, Ultrasound Laboratory Trento University of Trento Trento Italy