<|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: to ensure compliance with the existing irb approval letter and hipaa compliance for patients, the full deidentified dataset cannot be made available without prior written approval from the university of chicago hospital irb. requests for deidentified data can be made to dr. christopher daugherty, chairman of the university of chicago hospital irb at cdaugher@medicine.bsd.uchicago.edu.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>