Sample-size calculation for repeated-measures and longitudinal studies.

Guo Y Assistant professor, Department of Health Outcomes and Policy, College of Medicine, University of Florida, Gainesville, Fla. Electronic address: yiguo@ufl.edu.
Pandis N Private practice, Corfu, Greece; visiting assistant professor, Department of Orthodontics and Dentofacial Orthopedics, Faculty of Medicine, University of Bern, Bern, Switzerland.

Published in:

American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics. - 2015