<|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: Data underlying this study cannot be shared publicly due to ethical restrictions. Requests for data can be sent directly to Siberian State Medical University REC: lec.ssmu@mail.ru. It is likely that the REC secretary does not speak English, so it is recommended to CC Olga Zvonareva (o.zvonareva@maastrichtuniversity.nl) on all requests.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>