His 1802 drawing, "Cow-pock, or the wonderful effects of the new inoculation," shows patients who have been vaccinated coughing up miniature cows and sprouting horns.

The documentary shows patients and doctors who are fighting a battle against HIV, malaria and meningitis.

Some dentists buy generic before-and-after photos from dental supply companies to show patients.

"This is a solid piece of evidence you can show patients before they actually have a heart attack," he said.

Chinese government regulations prohibit advertisements from showing patients or symptoms - critical elements for a pharmaceutical commercial.

And, because of a history of exaggerated claims for medicines, advertisers in China are not allowed to show patients, children or symptoms.

He waits downstairs, and runs up to show patients out when I ring the consulting-room bell.

"I can show you individual patients who received conventional therapy who also survived 5 or 10 years."

The scenes he depicts seem to show patients caught up in seeming hysteria, and the deep red colors show anger of sorts.

She asks the nurse to play music and the camera zooms out to show viewers several female patients treated and wandering off.