<|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 confirm that all data underlying the findings are fully available without restriction. data was obtained from the swedish twin registry (karolinska institutet), the swedish national board of health and welfare and statistics sweden. interested individuals should contact patrik magnusson, patrik.magnusson@ki.se, head of the swedish twin registry, to obtain the data.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>