Comment on

• Environmental and heritable factors in the causation of cancer--analyses of cohorts of twins from Sweden, Denmark, and Finland.

  Lichtenstein P, Holm NV, Verkasalo PK, Iliadou A, Kaprio J, Koskenvuo M, Pukkala E, Skytthe A, Hemminki K. Lichtenstein P, et al. N Engl J Med. 2000 Jul 13;343(2):78-85. doi: 10.1056/NEJM200007133430201. N Engl J Med. 2000. PMID: 10891514