<|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: because our data are from a single site and contain numerous rare events, it is not possible to de-identify the data used in our study. due to ethical restrictions related to protecting patient confidentiality imposed by the university of chicago institutional review board, we are unable to make the data used in the study available to researchers. we can only share summary data that does not include details that could potentially identify a patient. we are willing to provide additional summary data upon request. interested readers should contact dr. david meltzer (dmeltzer@medicine.bsd.uchicago.edu).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>