<|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. the medicare claims data was granted to the authors under a data use agreement (dua). under the terms of this agreement, the authors are not allowed to share this data. an individual wanting access to this data would have to file their own dua with the centers for medicare and medicaid services and gain approval to have access. the survey data is held by robert o. morgan and approval would need to be granted by him for access to that data.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>