JoAnne Dahl, PhD , is professor of psychology at Uppsala University, Sweden. JoAnne is a clinical psychologist specializing in behavior medicine. She is coauthor of the The Art and Science of Valuing in Psychotherapy , Acceptance and Commitment Therapy for Chronic Pain, Living Beyond Your Pain, and ACT and RFT in Relationships.
Tobias Lundgren, MS, is a licensed clinical psychologist specializing in cognitive behavior therapy and ACT. He is an active clinician and a researcher in the areas of behavior medicine, psychometrics, and self-destructive behavior. Lundgren is affiliated with the psychology department at the University of Uppsala in Sweden, and has conducted research in many developing countries.