Bill McCausland, PhD, has worked for numerous years in the field of chemical dependency. He completed a doctoral dissertation in the area of personality, styles, and the level of stress associated with abusing substances that is associated with entering treatment. He is board-certified by the American Psychological Association in the treatment of alcohol and other psychoactive use disorders. In addition, he has treated hundreds of physicians, pharmacists, and dentists who are impaired due to substance dependence and has substantiated that they are solidly in recovery and able to practice in their areas of health care.