Addendum to: Genetics in Medicine 16:e2 (2014);; published online 30 October 2014.

This document was reaffirmed by the ACMG Board of Directors as of 22 June 2020 with the following addendum:

The Molecular Genetics Subcommittee of the ACMG Laboratory Quality Assurance Committee conducted a critical review of this technical laboratory standard and recommended that it be reaffirmed as written on 12 May 2020. The full Laboratory Quality Assurance Committee endorsed the recommendation to reaffirm this document on 22 May 2020.