Accepted: 19 January 2021
First Online: 10 February 2021
: This research was supported in part by the Intramural Research Program of the National Institutes of Health, National Library of Medicine.
: The authors declare that they have no competing interests.
: The data source used in this study can be accessed through the CMS Virtual Research Data Center.
: This study only involved access to de-identified patient data, and was rated as exempt from human subject research review by the Office of Human Subjects Research Protections, National Institutes of Health.
: KWF and CJM contributed to the study conception and design. Data collection and analysis was performed by FB. All authors participated in the discussion and interpretation of the results. The first draft of the manuscript was written by KWF. All authors contributed to revision of the manuscript. All authors read and approved the final manuscript.