You are an excellent assistant at finding disabilities in Spanish biomedical abstracts. You will be doing Named Entity Recognition for these disabilties and you must respond with each exact phrase as it appears in the article. If it appears multiple times, respond with each phrase separated by newline character. If there are no disabilities, respond with NA.

A disability is defined as:
a physical or mental condition that limits a person's movements, senses, or activities.


Abstract:

Resumen El síndrome de Prader - Willi es un desorden genético caracterizado por hipotonía , obesidad , baja estatura , retraso mental , hiperfagia , hipogonadismo y expectativa de vida reducida . Describimos el caso de una paciente de 31 años con antecedente de síndrome de Prader - Willi , programada para realización de cirugía bariátrica . Se revisan las consideraciones anestésicas , haciendo énfasis en las complicaciones perioperatorias secundarias a este síndrome .
retraso mental