Dana-Farber’s 4-year legal battle shines a light on the origins of PD-1 research — forcing a reckoning on who pioneered the landmark cancer breakthrough

Every blockbuster drug has roots extending back years, often decades, into labs around the world. And on rare occasions scientists' success with mice inspires a replay of events in a courtroom drama that can change the acknowledged authorship of the work, and who gets to share in the spoils of their explorations.