<|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: when this study began (2006), the authors did not obtain informed consent regarding the disclosure of raw data from the patients. thus, raw data cannot be made freely available in the manuscript, supplemental files, or a public repository. the acts-hnc dataset is available on request. all requests must be approved by the steering committee and must include an analysis plan. if the request is approved, the data will be available from the ethics committee of national hospital organization tokyo medical center. data requests may be sent to masato fujii, m.d., ph.d., department of otolaryngology, national hospital organization tokyo medical center, 2-5-1, higashigaoka, meguro-ku, tokyo 152-8902, japan. email: fujiimasato@kankakuki.go.jp.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>