LETTERS: PDF OnlySensitivity Analysis of Selective Migration in Ecologic Comparisons of HealthVeugelers, Paul J.; Guernsey, Judith ReadAuthor Information Department of Community Health and Epidemiology Faculty of Medicine Dalhousie University Halifax, Nova Scotia B3H 4H7 Canada Epidemiology: November 1999 - Volume 10 - Issue 6 - p 784 Free © 1999 Lippincott Williams & Wilkins, Inc.
