Proceedings of the National Academy of Sciences of the United States of America. 2/28/2017, Vol. 114 Issue 9, p2419-2424. 6p. 2 Color Photographs, 3 Graphs.
American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics. 159(4)