About the Authors

Konstantin V Danilenko

To whom correspondence should be addressed. E-mail: dani@irs.ru

Affiliation Centre for Chronobiology, Institute of Internal Medicine, Siberian Branch of the Russian Academy of Medical Sciences, Novosibirsk, Russia

Elena A Samoilova

Affiliation Medical Centres Tet-a-tet and Phytomed, Novosibirsk, Russia

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

KVD conceived the study, administered light therapy, performed the statistical analysis and wrote the paper. EAS provided gynaecological knowledge to the clinical interviews and final consultations, and did all investigational procedures including drawing venous blood and ultrasonography. Both authors designed the study, recruited and supervised the test participants, interpreted findings, and surveyed the literature on the topic.