Funding for this research was provided by:
Università degli Studi di Milano-Bicocca
Received: 10 December 2020
Accepted: 9 January 2021
First Online: 26 January 2021
Compliance with ethical standards
: No potential conflict of interest related to this article was reported.
: Code is available from the corresponding author upon reasonable request.
: Written informed consent was obtained from all adult participants.
: The original survey was approved by the Centers for Disease Control and Prevention Research Ethics Review Board. The present analysis was deemed exempt by the Institutional Review Board at our institution, as the dataset used in the analysis was completely de-identified.