A comparison of symptoms between Swedish and American post-polio individuals and assessment of lower-limb strength – a four-year cohort study
Author: Agre J, Grimby G, Rodriquez A, Einarsson G, Swiggum, E, Franke T
Journal/Publisher: Scandinavian Journal of Rehabilitation Medicine
Issue: 1995: 27(3): 183-92
http://www.ncbi.nlm.nih.gov/pubmed?term=8602481