<|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: for the analyses in the present study we used cancer-related information from the swiss childhood cancer registry (sccr). we are not allowed to make this information publicly available because of ethical restrictions by the ethics committee of the canton of bern (kek; reference-number kek-bern 166/2014). however, data can be formally requested by contacting prof. dr. gisela michel (gisela.michel@unilu.ch) and are available after evaluation by the responsible research committee.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>