25353
DESIGN : Cross - sectional analysis of data from community - dwelling volunteers randomly selected from the Baltimore Longitudinal Study of Aging from January 1 , 2005 , to December 31 , 2010 .
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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:
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