<|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. the data on which the manuscript is based are not freely available in the manuscript, supplemental files, or in a public repository, although a de-identified dataset is available upon request. requests for data should be submitted to the corresponding author, dr. frederica perera, fpp1@columbia.edu. the data are not freely available because they contain a significant number of data elements that are considered protected health information (phi) under hipaa regulations. we will make the data available upon request as a limited data set, under a standard hipaa data use agreement that will be reviewed and approved by our columbia university privacy officer.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>