Toro, J. R., Blake, P. W., Björkholm, M., Kristinsson, S. Y., Wang, Z. and Landgren, O. (2009) “Prior history of non-melanoma skin cancer is associated with increased mortality in patients with chronic lymphocytic leukemia”, Haematologica. Pavia, Italy, 94(10), pp. 1460-1464. doi: 10.3324/haematol.2008.004721.