Quick diagnosis units: avoiding referrals from primary care to the ED and hospitalizations

A new method of classifying prognostic comorbidity in longitudinal studies: Development and validation

Mary E. Charlson, Peter Pompei, Kathy L. Aleš et al. · Journal of Chronic Diseases · 1987 · 49.9K citations

Public Health, Biostatistics, Clinical Classification Systems +15

A prospective, randomized comparison of laparoscopic appendectomy with open appendectomy

Adrián E. Ortega, John G. Hunter, Jeffrey H. Peters et al. · The American Journal of Surgery · 1995 · 421 citations

Medicine, Surgery, General Surgery +8

Comparing methodologies for the cost estimation of hospital services

Siok Swan Tan, Frans Rutten, B. M. van Ineveld et al. · The European Journal of Health Economics · 2008 · 271 citations

Health Professions, Health Administration, Health Services Administration +14

A prospective randomized comparison of laparoscopic appendectomy with open appendectomy: Clinical and economic analyses

Kirsten Hall Long, Michael P. Bannon, Scott P. Zietlow et al. · Surgery · 2001 · 187 citations

Medicine, Surgery, Cost-effectiveness Analysis +11

A prospective randomized comparison of laparoscopic appendectomy with open appendectomy: Clinical and economic analyses

Kirsten Hall Long, Michael G. Bannon, Scott P. Zietlow et al. · Surgery · 2001 · 139 citations

Medicine, Surgery, Cost-effectiveness Analysis +11