<|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 underlying the study cannot be made publicly available due to ethical concerns regarding participant confidentiality. Requests for data from qualified researchers can be addressed to: Rwanda Biomedical Centre, Ministry of Health, PO Box 84 Kigali, Rwanda - for the attention of Dr F. Sayinzoga, Maternal Child and Community Health Department; email: felix.sayinzoga@gmail.com.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>