<|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 imposed in the interest of maintaining participant confidentiality, the data underlying the study are available to qualified researchers upon request to the Regional Ethical Review Board in Lund (registrator@epn.lu.se, ref. no. 2014/57) or from the authors at anette.agardh@med.lu.se.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>