<|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: data are available from the senior author (patrick stumpp, md). as these are patient data, they can be only transferred in anonymized form after approval of the leipzig ethics committee. only researchers who meet the criteria for access to confidential data can access the data.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>