<|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. data are held at the chengdu second people's hospital, china. requests for the data may be sent to the authors and the authors may be contacted at 1255395583@qq.com.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>