Michael Hattwick, MD, a practicing primary-care physician in the Washington, DC, area, has been a student and teacher of the Kabbalah for many years. He is the author of The ABBA Tradition, which explores the Tree of Life, the Ladder of Consciousness, the Four World tradition, and how Kabbalah facilitates psychological and spiritual development. Dr. Hattwick is actively involved in the movement toward a more integrated approach to health care in the greater Washington area and nationally. In 1994, he founded NoVa HealthCare to provide consulting to physicians and health-care organizations interested in clinical practice guidelines, evidence-based medicine, and innovative approaches to addressing problems with health care.