Gunn, Jane, Elliot, Peter, Densley, Konstancja, Middleton, Aves, Ambresin, Gilles, Dowrick, Christopher, Herrman, Helen, Hegarty, Kelsey, Gilchrist, Gail and Griffiths, Frances (2013) A trajectory-based approach to understand the factors associated with persistent depressive symptoms in primary care. Journal of Affective Disorders, 148 (2). pp. 338-346. ISSN 0165-0327 (doi:https://doi.org/10.1016/j.jad.2012.12.021)