Correction to: Journal of Ultrasound https://doi.org/10.1007/s40477-019-00396-z

Unfortunately, the first name and family names of all the authors have incorrectly been swapped and published in original article.

The complete correct names of all the authors are given below:

Matteo Mastrorosato, Elena Bertelli, Maria Cristina Bonini, Ginevra Danti, Costanza Vannini, Simone Agostini, Vittorio Miele.