<|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 legal restrictions imposed by the government of vietnam regarding patient confidentiality, data are available upon request. requests for data may be sent to dr. phan thi thu huong (huongphanmoh@gmail.com).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>