Funding for this research was provided by:
National Institute of Arthritis and Musculoskeletal and Skin Diseases (N01-AR-2-2258, N01-AR-2-2259, N01-AR-2-2260, N01-AR-2-2261, N01-AR-2-2262)
Article History
Received: 8 November 2018
Revised: 12 December 2018
Accepted: 25 December 2018
First Online: 7 January 2019
Compliance with ethical standards
: The study was approved by the Institutional Review Boards at the following sites: (1) University of Pittsburgh in Pittsburgh, Pennsylvania; (2) University of Maryland in Baltimore, Maryland; (3) Ohio State University in Columbus, Ohio; and (4) Memorial Hospital of Rhode Island, in Pawtucket, Rhode Island. All subjects signed an IRB-approved consent form prior to participation.
: None.