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:

Abstract 3q29 microduplication ( MIM 611936 ) is rare syndrome characterized by moderate mental retardation , craniofacial dysmorphic features and musculoskeletal anomalies . The size of the minimal critical region is about 1 .73 Mb . It is flanked by repetitive sequences and it is similar in size to the reciprocal 3q29 microdeletion , suggesting a non - allelic homologous recombination event ( NAHR ) at flanking LCR sequences as its aetiological mechanism . We describe a new familial case with variable expressivity .
moderate mental retardation