What qualifications have you got? <a href=" http://www.demannenvanschuim.nl/cheap-biaxin.pdf#segment ">cheap biaxin</a> A study like this can&rsquo;t prove that the disturbing ads prompted more people to quit. But the researchers argued that this is the most likely explanation. The smokers who saw the ads were more likely to make a quit attempt than the smokers who didn&rsquo;t, they noted. Also, the nationwide quit rate had been pretty flat for three years before the campaign started. It would be quite a coincidence for some other factor to bump it up just as the ads came out.