Megan Gilligan, Iowa State University (IMAGE) Iowa State University Caption Iowa State researcher Megan Gilligan says mothers are put in a vulnerable position when caring for a seriously ill adult child. Credit Iowa State University 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.