Nevison, Cynthia http://orcid.org/0000-0002-7157-092X
Zahorodny, Walter
Article History
First Online: 21 August 2019
Compliance with Ethical Standards
:
: CN and WZ declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
: The information used in this study was from datasets in which all relevant personally-identifiable information had been removed prior to our activities and in which the data were aggregated by age, at the state level. Therefore, this project did not require institutional review and approval for research with human subjects.