Key points are not available for this paper at this time.
P. M. Busse, S. K. Bose, R. W. Jones, L. J. Tolmach, The Action of Caffeine on X-Irradiated HeLa Cells: III. Enhancement of X-Ray-Induced Killing during G2 Arrest, Radiation Research, Vol. 76, No. 2 (Nov., 1978), pp. 292-307
Busse et al. (Wed,) studied this question.