Funding for this research was provided by:
Centers for Medicare and Medicaid Services (Project Number 11-W-00278/6)
Received: 14 November 2019
Accepted: 13 July 2020
First Online: 20 July 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board at the University of Texas Health Science Center at Houston (HSC-MS-18-0936). As this study was retrospective in design, informed consent was not needed.
: Not applicable.
: All authors declare that authors have no competing interests.