The authors would like to draw the reader's attention to a change in authorship in the following article: Invited Comment—Cortisol Levels in Prader–Willi Syndrome Support Changes in Routine Care. Am J Med Genet A 149A:138–139. The names of two contributors who were initially involved in this work, Duane T. Brandau, DO, Ph.D. (now at the Rocky Vista University College of Osteopathic Medicine) and Mariana Theodoro, BS were not included. The authors regret this oversight. The list of authors should therefore read: Merlin G. Butler, Duane T. Brandau, Mariana Theodoro, and Uttam Garg.