Additional file 1.
Overview and comparison of items included in the long and short versions of the questionnaires. Description of data: Table detailing the items included in the questionnaires.
Format: PDF Size: 47KB Download file
This file can be viewed with: Adobe Acrobat Reader
Sahlqvist et al. BMC Medical Research Methodology 2011 11:62 doi:10.1186/1471-2288-11-62