Correction

PHYSIOLOGY. For the article “Choline acetyltransferase mutations cause myasthenic syndrome associated with episodic apnea in humans” by Kinji Ohno, Akira Tsujino, Joan M. Brengman, C. Michel Harper, Zeljko Bajzer, Bjarne Udd, Roger Beyring, Stephanie Robb, Fenella J. Kirkham, and Andrew G. Engel, which appeared in number 4, February 13, 2001, of Proc. Natl. Acad. Sci. USA (98, 2017–2022), the authors note the following correction. Dr. Xin-Ming Shen's name and affiliation were inadvertently omitted from the list of authors. Dr. Shen's affiliation is Department of Neurology and Neuromuscular Research Laboratory, Mayo Clinic, Rochester, MN 55905. The corrected list of authors is: Kinji Ohno, Akira Tsujino, Xin-Ming Shen, Joan M. Brengman, C. Michel Harper, Zeljko Bajzer, Bjarne Udd, Roger Beyring, Stephanie Robb, Fenella J. Kirkham, and Andrew G. Engel.