CYP2D6 genotype and debrisoquine metabolic ratio (MR) were analyzed in 133 Nicaraguan Mestizos (NMs) and 260 Cubans divided into Cuban Mestizos (CMs) and White Cubans (WCs). The frequencies of poor metabolizers (MR12.6) were 6% in NMs, 3.9% in CMs and 5.3% i... ...

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