Received: 21 April 2020
Accepted: 30 July 2020
First Online: 17 August 2020
Ethics approval and consent to participate
: The protocol was approved by the ethics committee “hospitalo-facultaire” of Liège, and all subjects gave written consent before their enrolment (Belgian number: B707201422832; ref: 2014/302).
: Not applicable
: MH and NH are employees of Belgian Volition SPRL.