1. Morphological Madrid Research Center (MoMaRC), Ultradissection, Spain EchoTraining School, Madrid, Spain
2. Department of Anesthesiology and Reanimation, Clinical University Hospital in Valladolid, Valladolid, Spain
3. Human Anatomy Medicine University, Valladolid, Spain
4. Outcomes Research Consortium, Cleveland, Ohio, USA
5. Anesthesiology Clinical Research Office, Ataturk University, Erzurum, Turkey
6. Cadaver Lab Universidad Científica del Sur, Peru
7. Department of Anesthesiology, October 12University Hospital, Madrid, Spain
8. Puerta del Sol Hospital, Marbella, Malaga, Spain
9. Fisiotech Lab Studio, Firenze, Italy
10. Center for Regional Anesthesia and Pain Medicine (CRAPM), Wan Fang Hospital, Taipei Medical University, Taipei – Taiwan