<|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 upon request due to ethical restrictions that do not allow the authors to make this data public, namely, blood sampling. individuals or readers interested in the data should contact dr. jos_ antñnio ribeiro maia, from university of porto _ faculty of sports, at jmaia@fade.up.pt.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>