<|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 zhejiang center for disease control and prevention institutional data access / ethics committee for researchers who meet the criteria for access to confidential data. the study focused on hiv+ infections, all the patients data were obtained from the national treatment sub-database of zhejiang province. the database includes details of patients information, such as name, family address, id number, marriage, hiv+ diagnosis time, infection route, and treatment regimen. the information involved in the hiv infection must be kept secret.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>