Received: 3 February 2021
Accepted: 6 February 2021
First Online: 15 February 2021
Ethics approval and consent to participate
: The study from Caplan et al<i>.</i> was conducted post hoc on the ultrasound analyses of all patients included at the Lille University Hospital from two prospective cohorts. The creation and analysis of the two cohorts was approved by the regional ethics committee of Nord-Pas-De-Calais, France (2011-A00990-41 and 2011-A01598-33). All subjects gave written, informed consent prior to enrollment.
: Not applicable.
: The authors declare that they have no competing interests.