2. Women who have been referred for screening at U.T.M.D. Anderson Hospital, Houston, TX USA; U.T. Health Science Center-Houston,TX USA; Lyndon B. Johnson General Hospital, Houston, TX USA; British Columbia Cancer Agency, Vancouver, British Columbia, Canada; and the University College Hospital, Ibadan, Oyo State, Nigeria, Africa Cervical Screening Clinics, Family Planning Clinics or Gynecology Clinics.