<|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 restrictions imposed by the institutional review board at the johns hopkins bloomberg school of public health. requests for the data may be sent to the corresponding author (rzahn2@jhu.edu).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>