<|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, for approved reasons, some access restrictions apply to the data underlying the findings. data are available from the na-accord steering committee for researchers who meet the criteria for access to confidential data. ethical restrictions prevent public deposition of data. data will be made available to any researcher upon completion of a cover letter department of epidemiology 615 north wolfe street  baltimore, maryland 21205  www.jhsph.edu rigorous scientific concept sheet submission, review, and approval process through the naaccord. steering committee and executive committees, pursuant to agreements with the national institutes of health and constituent cohorts. guidelines for concept sheet submission and approval may be found at http://statepiaps.jhsph.edu/naaccord/collaboration/index.html.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>