<|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 ethical and legal restrictions, confidential data are available upon request. to receive anonymized data readers are welcome to contact the corresponding author (prof. dr. wolfgang huber, ii. medizinische klinik und poliklinik, klinikum rechts der isar der technischen universität münchen, ismaninger strasse 22, d-81675 münchen, germany. fax: 0049-89-4140-4808. e-mail: wolfgang.huber@lrz.tum.de).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>