Progression, Symptoms and Psychosocial Concerns among Those Severely Affected by Multiple Sclerosis: A Mixed-Methods Cross-Sectional Study of Black Caribbean and White British People. - Koffman, Jonathan; Gao, Wei; Goddard, Cassie; Burman, Rachel; Jackson, Diana; Shaw, Pauline; Barnes, Fiona; Silber, Eli; Higginson, Irene J. (PLoS ONE, 2013)