How to Measure Comorbidity (VIDEO) University of Queensland This video is under embargo. Please login to access this video. Caption A recent study of 5.9 million Danish individuals has provided the largest and most comprehensive study of comorbidity -- the development of 2 or more mental disorders -- to date. Credit Niels Bohr Professorship and Queensland Brain Institute Usage Restrictions Please credit the Niels Bohr Professorship and Queensland Brain Institute when used. License Licensed 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.