<|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 are available upon request due to ethical restrictions. interested researchers must be approved by the kyushu university institutional review board for clinical research. thus, to request the data, please contact dr. yoshihisa yamashita, section of preventive and public health dentistry, division of oral health, growth and development, faculty of dental science, kyushu university. email: (yoshi@dent.kyushu-u.ac.jp).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>