<|begin_of_text|><|start_header_id|>system<|end_header_id|>

You are an expert at identifying data availability statements in scientific text. A data availability statement describes where research data can be found or how it can be accessed.<|eot_id|><|start_header_id|>user<|end_header_id|>

Determine if the following text contains a data availability statement. Answer with 'yes' or 'no'.

Text: the authors confirm that all data underlying the findings are fully available without restriction. data are from a publicly available data set found at (http://www.cdc.gov/nchs/nhanes.htm). nhanes 2007-08 data can be obtained at (http://wwwn.cdc.gov/nchs/nhanes/search/nhanes07_08.aspx). nhanes 2009-10 data can be obtained at (http://wwwn.cdc.gov/nchs/nhanes/search/nhanes09_10.aspx). for each survey year demographics, examination, questionnaire, and laboratory data were available for download as individual files. they were subsequently merged in a file to be used with the stata statistical package.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>