Addendum to: Genetics in Medicine 13:667–675 (2011); https://doi.org/10.1097/GIM.0b013e3182227295; Article published online July 2011.

The ACMG Board of Directors approved reaffirmation of this section of the American College of Medical Genetics Technical Standards and Guidelines on May 21, 2018. Reaffirmation was recommended by the ACMG Laboratory Quality Assurance Committee on April 11, 2018.

Correspondence: acmg@acmg.net