Cellular tug of war experiment (VIDEO) Harvard Medical School This video is under embargo. Please login to access this video. Caption A micropipette assay measures adhesion force between two cells. Credit Tony Tsai/Sean Megason/Harvard Medical School Usage Restrictions None 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.