Relatives of patients with severe psychotic disorders: factors that influence contact frequency. Report from the UK700 trial. - Harvey, Kate; Burns, Tom; Sedgwick, Philip; Higgitt, Anna; Creed, Francis; Fahy, Tom; Harvey, K; Burns, T; Sedgwick, P; Higgitt, A; Creed, F; Fahy, T (British Journal of Psychiatry, 2001)