<|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 by the authors' institutional review board, data is available upon request to all interested researchers with proper permission/approval. interested researchers may contact angela bowling, administrative lead of the united states actue liver failure study group (angela.bowling@utsouthwestern.edu) to request data. data is also available upon request with permission via the national institute of diabetes and digestive and kidney diseases (niddk) and data appear on clinicaltrials.gov (identifier: nct00518440). requests for a copy of the database may also be made through the niddk webpage: (https://www.niddkrepository.org/studies/aalf/?query=acute%20liver%20failure).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>