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19.4.795
19.4.795
http://dx.doi.org/10.1093/IJE/19.4.795
A methodological review of non-therapeutic intervention trials employing cluster randomization, 1979-1989.
P356
Q37788706-E9A05FC9-EA9B-47F8-9311-5EB506BFB2DF
P356
19.4.795
http://dx.doi.org/10.1093/IJE/19.4.795