Mohamed Hasim and Marie Marotel (IMAGE) The Ottawa Hospital Caption Research led by Mohamed Hasim (left) and Marie Marotel (right) in Michele Ardolino's lab shows that a kind of kiss between cells, called trogocytosis, plays a key role in the battle between the immune system and blood cancer cells. Credit The Ottawa Hospital Usage Restrictions For use only in stories about this research. 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.