Jesper Medom Vestergaard (IMAGE) Aarhus University Caption Working up to seven nightshifts a week does not increase your risk of cardiovascular diseases, a new study from Aarhus University shows. PhD.Student, Jesper Medom Vestergaard from the Department of Clinical Medicine is behind the study. Credit Private Usage Restrictions Only to be used with this article License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.