<|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 ethical and legal restrictions in accordance with the guidelines provided by the ethical committee of bern. data are available upon request from the authors who may be contacted at the corresponding author's address, the department of emergency medicine at the university hospital of bern. the study protocol was approved by the ethics committee of the canton of bern, switzerland.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>