<|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: data are available from the institute of health policy and management, a department of the erasmus university rotterdam, and from the ivo addiction research institute. the authors confirm that confidential data are currently in a repository and are fully available. if desired, all data files underlying the study findings can be requested by contacting marleen foets, who is one of the authors of this paper (email address: foets@bmg.eur.nl), for researchers who meet the criteria for access to confidential data.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>