<|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: study data are stored at the repository of karolinska institutet. data are not freely accessible, but each request is assessed by karolinska institutet ethics committee, and approval of data access can be given after this assessment. to request data, contact either samir el alaoui at samir.el.alaoui@ki.se, or karolinska institutet by e-mail at info@ki.se, or at karolinska institutet, se-171 77, stockholm, sweden.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>