42 medical services; namely, physical therapy, work hardening, functional capacity evaluations, physical rehabilitation, sports medicine, industrial medicine, back school, and injury evaluations; publication of books, magazines, articles, newsletters, and instructional materials in the field of medicine; namely, physical therapy, work hardening, functional capacity evaluations, physical rehabilitation, sports medicine, industrial medicine, back school, and disability evaluation ; educational services, such as classes and seminars, in the field of medicine; namely, physical therapy, work hardening, functional capacity evaluations, physical rehabilitation, sports medicine, industrial medicine, back school, and disability evaluation