<|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: data cannot be made publicly available due to ethical restrictions. data are available from the digestive endoscopy center data access committee of general hospital, tianjin medical university. readers may contact the first author, hailong cao (cao_hailong@163.com), to request the data.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>