'Subjects from 0-17 years old were included using a primary search term for diagnosis of “ingested object” from the time period of 2002-2015. Cases of ingested objects were classified as “suspected magnet ingestion” (SMI) if the term “magnet” appeared anywhere in the narrative section of the database. Researchers then identified specific characteristics of ingested magnets for descriptions related to rare-earth metals or small size. Specific inclusionary terms for small, round size/shape included: small, tiny, ≤1cm, battery-like, marble, bead, BB, ball, sphere, round, and circular. Inclusion terms for multiple were: multiple, > 1, or the plural “magnets.” '

This has got to have an obscenely high false positive rate.

When the ban was being proposed the CPSC's claim was "at least a dozen" from 2009-2012.

http://www.foxnews.com/us/2012/08/07/feds-sue-to-take-zen-ma...