<|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, such as patient confidentiality, the full anonymized data set is available to the reader upon request to dr. cheung (cheucw@hku.hk). only summary data have been included in the manuscript, and the full data set (annonymised) is available to the reader upon writing to dr. cheung. however, we are not able to provide data on individual patients.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>