1. Ahnen, D.J. (1996) The genetic basis of colorectal cancer risk. Advances in Internal Medicine, 41, 531–52.
2. Allen, J.I. (1995) Molecular biology of colon polyps and colon cancer. Seminars in Surgical Oncology, 11, 399–405.
3. Anderson, W.F. (2000) Gene therapy. The best of times, the worst of times [comment]. Science, 288, 627–9.
4. Appelbaum, F.R. (1997) Graft versus leukemia (GVL) in the therapy of acute lymphoblastic leukemia (ALL). Leukemia, 11, Suppl. 4, S15–7.
5. Aspinall, R.J. and N.R. Lemoine (1999) Gene therapy for pancreatic and biliary malignancies. Annals of Oncology, 10, Suppl. 4, 188–92.