<|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 current data come from the institutional database and contains confidential patient information. patients did not approve distribution of their information to the public. our institutional review board (wonju severance christian hospital) restricts data distribution for ethical reasons and these restrictions are in line with the approved consent procedure. all data are available upon request. interested researchers may submit requests for data to the corresponding author.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>