<|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. the data underlying the findings in our study are not freely available in the manuscript, supplemental files or in a public repository. this is because the data we used in our study are supplied by the second affiliated hospital zhejiang university school of medicine who cooperates with us, and there are some restrictions for the hospital to provide the data in an entirely public way. but readers may contact prof. huafeng liu (email: liuhf@zju.edu.cn) to request the data.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>