Sat Bir Singh Khalsa, PhD has been fully engaged in basic and clinical research on the efficacy of yoga and meditation practices in improving physical and psychological health since 2001. He has practiced a yoga lifestyle since 1972 and is a certified instructor in Kundalini Yoga as taught by Yogi Bhajan. He is the Director of Research for the Kundalini Research Institute, Research Associate at the Benson Henry Institute for Mind Body Medicine, Research Affiliate of the Osher Center for Integrative Health, and an Associate Professor of Medicine at Harvard Medical School in the Departments of Medicine and Neurology at Brigham and Women's Hospital in Boston. He has conducted clinical research trials evaluating yoga interventions for insomnia, post-traumatic stress disorder, chronic stress, and anxiety disorders and also in both public school and occupational settings. Dr. Khalsa works with the International Association of Yoga Therapists to promote research on yoga and yoga therapy as the chair of the scientific program committee for the annual Symposium on Yoga Research and as editor-in-chief of the International Journal of Yoga Therapy. He is medical editor of the Harvard Medical School Special Report: An Introduction to Yoga and chief editor of the medical textbook The Principles and Practice of Yoga in Health Care. He lives in Massachusetts, USA. Shirley Telles has a degree in conventional medicine (MBBS) and a MPhil and PhD in Neurophysiology. Both MPhil and PhD theses were on the effects of yoga practice. Dr. Telles received a Fulbright fellowship in 1998 and in 2001 an award from the Templeton Foundation for creative ideas in neurobiology. In 2007 she received an Indian Council of Medical Research Center for Advanced Research to study meditation's effects through autonomic variables, evoked and event related potentials, polysomnography and fMRI. Dr Telles has been directing yoga research at Patanjali Research Foundation, Haridwar, India; www.patanjaliresearchfoundation.com since 2007. Dr. Telles has over 210 research papers cited in bibliographic databases and authored 7 books. She is an enthusiastic practitioner of yoga. She lives between Goa and Bangalore in India. Catherine Cook-Cottone. Catherine Cook-Cottone, Ph.D., is a licensed psychologist (in Colorado and New York), yoga therapist, and professor at University at Buffalo, SUNY. She has written 10+ books and over 100 research articles and chapters on mindful self-care, yoga, embodiment, self-regulation, eating disorders, and trauma. She is president of Yogis in Service and has researched and consulted with the Africa Yoga project and the United Nations Foundation to develop and deliver trauma-informed, mindfulness-based resilience training for yoga teachers and humanitarian workers in North America, Africa, and the Middle East. She is a trauma-therapist and trained in EMDR (eye movement desensitization reprocessing) and teaches courses in psychopathology, mindful therapy, psychopathology, advanced counseling techniques, and counseling with children and adolescents. In 2018, she was awarded the American Psychological Association's Citizen Psychologist Presidential Citation.