The western pioneer of yoga as therapy, Richard Miller, has developed the use of Yoga nidra for rehabilitating soldiers in pain, using the Integrative Restoration (iRest) methodology.[9] Miller worked with Walter Reed Army Medical Center and the United States Department of Defense studying the efficacy of the approach.[10][11] According to Yoga Journal, "Miller is responsible for bringing the practice to a remarkable variety of nontraditional settings" which includes "military bases and in veterans' clinics, homeless shelters, Montessori schools, Head Start programs, hospitals, hospices, chemical dependency centers, and jails."[12] The iRest protocol was used with soldiers returning from Iraq and Afghanistan suffering from post-traumatic stress disorder (PTSD).[13][14][11] Based on this work, the Surgeon General of the United States Army endorsed Yoga Nidra as a complementary alternative medicine (CAM) for chronic pain in 2010.[15]