In this task, you are given a sentence in the Spanish language. Your task is to translate the Spanish sentence into the English language.

[Q]: Son órganos linfoides primarios
[A]: They are primary lymphoid organs


[Q]: Se ha llevado a cabo un estudio con el fin de determinar el riesgo de hemorragia digestiva alta (HDA) asociado con el uso de diferentes anti-inflamatorios no esteroideos (AINE). Para ello se incluyeron 2.777 pacientes con HDA y 5.532 pacientes emparejados con los anteriores por edad y mes de ingreso o consulta, en los mismos hospitales, pero por razones que no tuvieran nada que ver con el uso de AINE. Se calculó el riesgo comparativo de sufrir una HDA asociado a la exposición previa a diferentes AINE. ¿De qué tipo de estudio se trata?
[A]: A study has been carried out to determine the risk of upper gastrointestinal bleeding (UGIB) associated with the use of different non-steroidal anti-inflammatory drugs (NSAIDs). For this purpose, 2,777 patients with UGIB and 5,532 patients matched with the previous ones were included by age and month of admission or consultation, in the same hospitals, but for reasons that had nothing to do with the use of NSAIDs. The comparative risk of suffering a UGIB associated with previous exposure to different NSAIDs was calculated. What kind of study is it?


[Q]: El trofoblasto se desarrolla a partir de
[A]:
The trophoblast develops from