TASK DEFINITION: In this task, you are given a sentence in the Spanish language. Your task is to translate the Spanish sentence into the English language.
PROBLEM: Es una molécula coestimuladora que se expresa en las células presentadoras de antígeno

SOLUTION: It is a costimulatory molecule that is expressed in the antigen-presenting cells

PROBLEM: La dinámica demográfica de una comunidad viene determinada por la

SOLUTION: The demographic dynamics of a community is determined by

PROBLEM: ¿En qué modelo se basan los programas de intervención empleados con más éxito en el tratamiento temprano del autismo infantil?

SOLUTION:
On what model are the intervention programs most successful in the early treatment of childhood autism based?