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Randomised controlled comparison of the Health Survey Short Form (SF-12) and the Graded Chronic Pain Scale (GCPS) in telephone interviews versus self-administered questionnaires. Are the results equivalent?
Margitta Lungenhausen, Stefan Lange, Christoph Maier, Claudia Schaub, Hans J Trampisch, Heinz G EndresVolume:
7
Language:
english
DOI:
10.1186/1471-2288-7-50
Date:
December, 2007
File:
PDF, 375 KB
english, 2007