Translate the given Spanish text to English

[Q]: The two phases are applied sequentially.
[A]: Las dos fases se aplican secuencialmente.


[Q]: Correlations between polymorphisms and addiction are provided.
[A]: Se proporcionan correlaciones entre polimorfismos y adicción.


[Q]: 2-n-butyl-BIT is preferred.
[A]:
Se prefiere el 2-n-butil-BIT.