TASK DEFINITION: Translate the given Spanish text to English
PROBLEM: The color of the stick is improved by the addition of the chelating agent.

SOLUTION: El color de la barra se mejora mediante la adicion del agente acomplejante.

PROBLEM: Correlations between polymorphisms and addiction are provided.

SOLUTION: Se proporcionan correlaciones entre polimorfismos y adicción.

PROBLEM: Antipneumolysin monoclonal antibodies.

SOLUTION:
ANTICUERPOS MONOCLONALES ANTINEUMOLISINA.