Received: 25 June 2019
Accepted: 30 April 2020
First Online: 26 May 2020
Ethics approval and consent to participate
: The study methods were approved by the University of Pittsburgh IRB (PRO13040355) prior to data collection, which ruled the study to have ‘exempt’ status because it was based upon a review of existing medical records. Due to the ‘exempt’ status of the study, no informed consent was obtained from any participant.
: Not applicable because this manuscript does not contain any individual data, identifying details, images or videos.
: The authors declare that they have no competing interests.