For more information see section 3.15.8 in the AMA Manual of Style, 11th ed.
AMA supports using The Data Citation Group's Joint Declaration of Data Citation Principles for guidance on citing data in databases.
In addition, AMA provides a standard format for citing data from online databases. Non-applicable elements can be excluded.
Author(s) (if given). Title of the database. Publisher or database host/owner; Year and/or version number. Updated [date]. Accessed [date]. URL