Eva R. Helgeson

Development of a Multi-Year Population-Based Data Warehouse of Standardized Medical Costs: Methods and Results

James M. Naessens, Jill M. Killian, Roger Evans, 1998, AMIA.

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

Eva R. Helgeson, C. D. Smith, W. Harmsen, 2001, Surgery.