OCCUPATIONAL HEALTH CLINICS FOR ONTARIO WORKERS INC. poster was designed to warn workers about workplace dangers to their health. On a visit to my doctor I asked the x-ray technician if she could give me an X-ray of a chest. After removing the patient’s name from the X-ray, she gave it to me. The poster went through three complete designs, all of them using the X-ray as a central feature, before the client was satisfied with this one.