Penn Nursing's Mary Ersek (IMAGE) University of Pennsylvania School of Nursing Caption Mary Ersek, Ph.D., RN, FPCN, holds a joint appointment at the Department of Veterans Affairs and Penn Nursing. Credit Penn Nursing 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.