Funding for this research was provided by:
Text and Data Mining valid from 2018-04-10
Received: 5 July 2017
Accepted: 15 March 2018
First Online: 10 April 2018
Ethics approval and consent to participate
: This study was conducted using secondary data. There was no active enrollment or active follow-up of patients, and no data were directly collected from patients. The New England Institutional Review Board provided oversight during the conduct of this study and its Privacy Board granted a Waiver of Authorization for linkage of claims and medical records.
: Not applicable
: FW, DD, YD, and EN are employees of Optum Epidemiology. FX and CC are employees of Amgen, Inc.
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