<|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 restriction of database use is implemented by the the ethics committee of first affiliated hospital of guangzhou medical university. requests to access data may be submitted by contacting dr. wei-jie guan (battery203@163.com).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>