Third mailings in epidemiological studies: are they really necessary?

Alison M Elliott1, Philip C Hannaford

  • 1Department of General Practice and Primary Care, University of Aberdeen, Foresterhill Health Centre, Westburn Road, Aberdeen AB25 2AY, UK. a.m.purves@abdn.ac.uk

Family Practice
|September 26, 2003
PubMed
Abstract

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