Funding for this research was provided by:
Text and Data Mining valid from 2019-02-19
Received: 8 November 2018
Accepted: 4 February 2019
First Online: 19 February 2019
Compliance with ethical standards
: Authors JEL and GP received funding to perform the study from the sponsor. At the time of the study, Authors RP, DG, and LB were employees of the sponsor. Author CBL was a consultant to the sponsor, but received no monies for this study. The statistician received compensation for her work on the study from the sponsor.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.