Sleep in the land of the midnight sun and polar night: The Tromsø study.
Sivertsen Børge, Friborg Oddgeir, Pallesen Ståle, +2 more·Chronobiology international
While some diseases and human behaviors fluctuate consistently with season, the extent of seasonal variations in sleep, especially at high latitudes, is less consistent. We used data from a geographic region (69º North) with extremely large seasonal differences in daylight that had the participants blinded for the…