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:

Iodine is a trace element essential for the synthesis of thyroid hormones . Iodine deficiency is especially worrying in neonates , who must synthesize sufficient thyroid hormones to meet their hormonal requirements , since formula preparations for premature and term infants do not always contain adequate iodine . Worldwide , the main cause of hypothyroxinemia is iodine deficiency , which in turn is the main preventible cause of mental retardation and cerebral palsy .
mental retardation
cerebral palsy