Simpkins J, Divine G, Wang M, Holmboe E, Pladevall-Vila M, Williams LK. Improving asthma care through recertification: a cluster randomized trial. Arch Intern Med. 2007 Nov 12;167(20):2240-8.
Bollini P, Garcia Rodriguez LA, Perez GS, Walker AM. The impact of research quality and study design on epidemiologic estimates of the effect of nonsteroidal anti-inflammatory drugs on upper gastrointestinal tract disease. Arch Intern Med. 1992 Jun 1;152(6):1289-95.
Jick H, Porter J, Morrison AS, Rothman KJ. Lung cancer in young women. Arch Intern Med. 1979 Jul 1;139(7):745-6.