<|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. to access nhbs data, non-cdc investigators should submit a concept proposal to gabriela paz-bailey, md, phd, msc (team lead for the behavioral surveillance team, bcsb/dhap/nchhstp/cdc. non-cdc investigators with approved concept proposals must apply for guest researcher status in order to obtain access to a cdc workstation and secure data server, to complete data security and confidentiality training, and to sign data use and nondisclosure agreements.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>