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KWI094
KWI094
http://dx.doi.org/10.1093/AJE/KWI094
Application of the case-crossover design to reduce unmeasured confounding in studies of condom effectiveness.
P356
Q37865164-987CF894-4194-44DA-8E5E-ADD98C5D92E3
P356
KWI094
http://dx.doi.org/10.1093/AJE/KWI094