12701
We examined whether the NPSR1 gene functional polymorphism Asn ( 107 ) Ile ( rs324981 , A > T ) influences personality , impulsivity , and attention - deficit / hyperactivity disorder ( ADHD ) - related symptoms in a population - representative sample , and whether any eventual associations depend on age , sex , family relations and stressful life events ( SLE ) .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None