Shattock, Alan G and Irwin, Fiona M and Morgan, Bridget M and Hillary, Irene B and Kelly, Michael G and Fielding, JF and Kelly, Deirdre A and Weir, Donald G (1985) Increased severity and morbidity of acute hepatitis in drug abusers with simultaneously acquired hepatitis B and hepatitus D virus infections. British Medical Journal, 290, (6479), pp. 1377-1380.