Comparison of control and FOP cell (IMAGE) University of Pennsylvania School of Medicine Caption An image of a control cell with normal muscle regeneration compared to a cell with the same genetic mutation that people with FOP have. Credit Courtesy of Penn Medicine Usage Restrictions Use with specified credit. 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.