Fekete C, Segerer W, Gemperli A, Brinkhof MWG, for the SwiSCI Study Group: Participation rates, response bias and response behaviour in the community survey of the Swiss Spinal Cord Injury Cohort Study (SwiSCI). BMC Medical Research Methodology 2015; 15: 80. Published online 2015 Oct 8. doi: 10.1186/s12874-015-0076-0.