In June 2012 the British Lung Foundation released a report looking at the health impacts of smoking cannabis. (The report since appears to have been withdrawn.) In one section, the report claimed "each cannabis cigarette increases the chances of developing lung cancer by as much as an entire packet of 20 tobacco cigarettes", and the claim received prominence in launch interviews with the then chief executive, Dame Helena Shovelton. The report supported the claim by reference to a 2008 study, "Cannabis use and risk of lung cancer: a case-control study" (Aldington et al.), published in the "European Respiratory Journal". That study had been challenged within the year and in the same journal, long before the BLF's claim.