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 Prader–Willi syndrome is a genetic disorder characterized by hypotonia , obesity , short stature , mental retardation , hyperphagia , hypogonadism and low life expectancy . We describe the case of a 31 - year - old female patient with Prader–Willi syndrome scheduled for bariatric surgery . Anesthetic considerations are reviewed highlighting perioperative complications associated with this syndrome .
mental retardation