LONDON The World Health Organisation has been the target of a long-running, elaborate and secret campaign by the tobacco industry to subvert its anti-tobacco initiatives, according to a report published today. The independent report, commissioned by WHO after last year's publication of confidential tobacco industry documents, concludes: "That tobacco companies resist proposals for tobacco control comes as no surprise, but what is now visible is the scale, intensity and, importantly, the tactics of their campaign." The report calls for stronger rules on conflict of interest to protect the integrity of international decision making.