Authors (IMAGE) University of Arizona Health Sciences Caption Observing a fluorescing image that illustrates how a neurohormone, prolactin, affects how pain is felt are the study's primary authors, Yanxia Chen (seated) and Dr. Aubin Moutal (standing left), surrounded by co-authors Drs. Frank Porreca, Edita Navratilova and Rajesh Khanna. Credit [Photo: The University of Arizona Health Sciences, Noelle Haro-Gomez] 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.