<|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. due to ethical restrictions, data cannot be made publicly available. however, data will be made available to all interested researchers after receiving permission from the data protection officials of the charité universitätsmedizin berlin committee. requests for data access will be received by stefan koch (stefan.koch@charite.de).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>