AM Martelli, A Cappellini, PL Tazzari, AM Billi, C Tassi, F Ricci, F Fala, R Conte. Caspase-9 is the upstream caspase activated by 8-methoxypsoralen and ultraviolet-A radiation treatment of Jurkat T leukemia cells and normal T lymphocytes. Haematologica 2004;89(4):471-479; https://doi.org/10.3324/%x.