Funding for this research was provided by:
National Institute of Arthritis and Musculoskeletal and Skin Diseases (1K23AR059199, 1U34AR069201)
Received: 24 January 2019
Accepted: 2 September 2019
First Online: 11 September 2019
Ethics approval and consent to participate
: This study is based on secondary analysis of publicly available administrative data. It did not require consent since it was not considered human subjects research.
: Not applicable.
: The authors declare that they have no competing interests.