The Journal of Arthroplasty · 2001 · 398 citations · 14 references
MedicineOrthopedic SurgerySurgeryElbow SurgeryJoint Replacement SurgeryOrthopedicsAnkle ArthroplastyComplications Of ArthroplastyElbow ArthroplastyHip ArthroplastyKnee ArthroplastyShoulder ArthroplastyJoint Replacement Recovery
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Why we need observational studies to evaluate the effectiveness of health care
BMJ · 1996 · 1.6K citations