Article History
Received: 30 April 2019
Accepted: 2 August 2019
First Online: 16 August 2019
Compliance with ethical standards
: The authors are employees of the Food and Drug Administration.
: The authors have no other conflicts of interest.The authors have no conflicts of interest besides what is stated above (employed by FDA).
: There was no Ethics Committee or IRB approval for this manuscript. There was no research involving humans or animals.
: None.