Furthermore, we emphasize that time of day is, and should be considered, a key biological variable in research design similar to sex. 
THERM
Furthermore, we emphasize that time of day is, and should be considered, a key biological variable in research design similar to sex. 
THERM
Furthermore, we emphasize that time of day is, and should be considered, a key biological variable in research design similar to sex. 
THERM
Furthermore, we emphasize that time of day is, and should be considered, a key biological variable in research design similar to sex. 
THERM