<|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 all data underlying the findings are fully available without restriction. due to ethical restrictions, data are unsuitable for public deposition. data are available upon request to the ethics committee of guangdong pharmaceutical university for researches who meet the criteria for access to confidential data by contacting dr. guan xiangqun (tel: +86-20-61321847; e-mail: ywb21847@163.com). this information will only be available after acceptance.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>