<|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 ethically restricted, and can be requested from the study pregancy-associated heart failure authors at the department of medicine, old groote schuur hospital, groote schuur drive, observatory 7925, cape town, south africa. tel: +27-21-406-6200; fax: +27-21-448-6815; email: bongani.mayosi@uct.ac.za.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>