de Groot S, Haisma JA, Post MW, van Asbeck FW, van der Woude LH. Investigation of bias due to loss of participants in a Dutch multicentre prospective spinal cord injury cohort study. JRM [Internet]. 2009 Feb. 16 [cited 2024 Aug. 17];41(5):382-9. Available from: https://medicaljournalssweden.se/jrm/article/view/18057