It's almost inconceivable now, but tobacco companies once used the reassuring image of a doctor enjoying a cigarette in their adverts - "More doctors smoke Camels than any other cigarette," for example.

Percentage of male doctors who smoke by country;

China 61%
Bosnia & Herzogovina 55%
Russian Federation 41%
Saudi Arabia 38%
Spain 37%
UK 8%
India 3%