Fig. 12 MRI scans of baboon brains injected with ADV/RSV-tk A. T2 weighted scan of a 
baboon brain 6 weeks after injection with 3 x 10 10 particles of ADV/RSV-tk. B. T2 weighted 
scan 6 weeks after injection of 1 .5 x 10 9 particles and treatment with GCV. 
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Recombinant DNA Research, Volume 20 
