<|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, for approved reasons, some access restrictions apply to the data underlying the findings. due to legal restrictions the data cannot be made publicly available. however, the raw data is freely accessible by all the authors included, and stored at the karolinska institute. readers may contact either of the authors akj, lek, lthj or ja for additional data. alternatively questions regarding data can be addressed to anders ekbom (anders.ekbom@ki.se) head of the epidemiology unit at karolinske institute.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>