<|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 author confirms that all data underlying the findings are fully available without restriction. data from this study were taken from the national health and nutrition examination survey (nhanes), a publicly available, deidentified data set produced by the national center for health statistics (nchs) in the united states. those wishing to access this data may download them at the following links: 19992000: http://wwwn.cdc.gov/nchs/nhanes/search/nhanes99_00.aspx 20012002: http://wwwn.cdc.gov/nchs/nhanes/search/nhanes01_02.aspx 20032004: http://wwwn.cdc.gov/nchs/nhanes/search/nhanes03_04.aspx 20052006: http://wwwn.cdc.gov/nchs/nhanes/search/nhanes05_06.aspx.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>