<|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 restrictions, data are available upon request. interested researchers may submit requests for data to dr. kamalesh sarkar (the corresponding author) for confidential data preserved under the supervision of the institutional ethics committees of the national institute of cholera and enteric diseases, kolkata, india. further, contact details of the member secretary, institutional ethics committee of national institute of cholera and enteric diseases, kolkata, india: dr. phalguni dutta, institutional ethics committee, national institute of cholera and enteric diseases, p-33, c.i.t. road, scheme xm, beleghata, kolkata 700, 010, india, +91-98300-30188, (drpdutta@yahoo.com).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>