Moustapha Hassan, Karolinska Instiutet (IMAGE) Karolinska Institutet Caption Dr. Moustapha Hassan is a principal investigator and a professor of transplantation research at Karolinska Institutet in Stockholm, Sweden. Credit Stefan Zimmerman Usage Restrictions The portrait of Moustahpa Hassan may only be used in connection to news reports about his research at Karolinska Institutet. 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.