<|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: ethical and legal restrictions prohibit completely free availability of the authors' data in a public repository. this study is based on data from usual care, and public availability would compromise patient confidentiality. authors may request the data directly via the dataverse network or contact sarah dörenkamp (sarah.dorenkamp@maastrichtuniversity.nl).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>