<|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: due to restrictions related to approved research protocols, all relevant data are available after positive evaluation by the data protection officer and the institutional review board upon request by contacting dr. erika von mutius (erika.von.mutius@med.uni-muenchen.de).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>