<|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: all relevant data underlying the findings of this study are currently included in the paper and its supporting information files. with respect to data availability, there were some restrictions to accessing the raw data. the data are available from the korean national health insurance service (nhis), but access to confidential data is limited to researchers who meet the necessary criteria; basically, any researchers who propose a study subject and plans with standardized proposal form, and being approved by nhis review committee of research support, can access the raw data. detailed process and a provision guide is now available at (http://nhiss.nhis.or.kr/bd/ab/bdaba000eng.do).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>