health care services; medical clinics; medical consultations; medical services; medical testing for diagnostic or treatment purposes; medical laboratory services, physical, occupational, speech, and chemical dependency rehabilitations services; physical, occupational, speech and chemical dependency therapy services; mental health services; psychiatric services; medical and nutritional counseling; hospices; managed health care; ophthalmology services; optometry services; physician hospital organizations, rental of medical equipment providing information in the area of health care via on-line computer data bases