<|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 authors are restricted from making the data set used in this study available in the public domain because of the strict ethical restrictions imposed by the research and ethics committee of the federal medical centre, makurdi, benue state, nigeria. however, researchers who may be interested in the data may contact the principal investigator of the programme, dr jonah abah (docjoab@yahoo.com), who has confirmed he will make the data available on request.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>