Received: 11 November 2019
Accepted: 24 February 2020
First Online: 4 March 2020
Ethics approval and consent to participate
: Because our study used de-identified patient data, available to all members of the Vizient database, our study was determined by the institutional review board to be not human subjects research, and therefore did not require further review. Need for ethics approval was waived by the Mount Sinai Health System Program for the Protection of Human Subjects Institutional Review Board.As this is a retrospective study, there is no need for consent to participate to be obtained.
: Not applicable.
: The authors declare that they have no competing interests.