Among the most cited articles, the aforementioned international asthma study is itself exceeded by an article
by Dockery et al. in the New England Journal of Medicine, on the association between air pollution and mortality in six US cities [20]. This is one of the first studies pointing out the association between air pollution by particulates and sulfates and increased death rates due to pulmonary causes, deducting additional risks such as smoking beforehand. As an author, D.W. Dockery features the highest average citation rate (125.54). However, in total citations, Dockery is only second to J. Schwartz