About the Authors
- Mark R. Smith, Helen J. Burgess, Louis F. Fogg, Charmane I. Eastman
- Biological Rhythms Research Laboratory, Department of Behavioral Sciences, Rush University Medical Center, Chicago, Illinois, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: MRS HJB CE. Performed the experiments: MRS HJB. Analyzed the data: MRS LFF. Wrote the paper: MRS HJB LFF CE.