Safely increasing the proportion of patients with community-acquired pneumonia treated as outpatients: an interventional trial.Steven J. Atlas, Daniel E. Singer, Diann C. Burnham et al.|PubMed|1998Cited by 241
Understanding Physician Adherence With a Pneumonia Practice GuidelineEthan A. Halm, Daniel E. Singer, Steven J. Atlas et al.|Archives of Internal Medicine|2000Cited by 190