Paula Ragan, Ph.D., is one of those leaders and one of a select group who not only was mentored by Termeer — an industry legend lost too soon — but cofounded a company with him. Today, she’s part of another elite group: female CEOs of biopharmaceutical companies. This is the story of how she went from aspiring academic to biopharmaceutical protégé to CEO of X4 Pharmaceuticals (NASDAQ: XFOR), a six-year-old company focused on improving the immune system for treating rare diseases.