<|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 hospital authority and the university of hong kong. the data set cannot be deposited publicly due to ethical restrictions. data requests will be subject to critical review from the hospital authority and the university of hong kong ethical committee. requests for data can be sent to the corresponding author who will obtain the appropriate permissions from the ethics committee.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>