<|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 as a consequence of the multicentre character of the contrast study, the data cannot be made publicly available online. however, the data set underlying the findings of the present study is available to all interested researchers upon request. the contrast investigators can be reached by contacting professor m.l. bots, epidemiologist, at m.l.bots@umcutrecht.nl.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>