<|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 restrictions, we are not able to provide a de-identified data set. This is because participants (patients) did not consent to have their data made available publicly. Due to the small number of patients participating in this study is may also be possible to identify certain individuals from de-identified data. These restrictions have been imposed by the Human Ethics Research Committee at the University of Sydney. Requests for data should be sent to Shelley Martin, Research Support Administrator at the Sydney School of Public Health, Faculty of Medicine and Health, University of Sydney, Australia. Email: shelley.martin@sydney.edu.au.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>