<|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: the authors confirm that, for approved reasons, some access restrictions apply to the data underlying the findings. we have collected and combined data from three sources. 1) our mortality data have been retrieved from national statistical offices in finland, sweden, norway and denmark, scotland, england and wales, netherlands, belgium, france, switzerland, barcelona, basque country and madrid, turin, tuscany, czech republic, poland, hungary, lithuania and estonia. the original data can only be retrieved from each country directly. we have presented the sources of mortality data in appendix table a1 of our article. the second source of data was on self-reported morbidity and risk factors. these were collected from national health surveys (nhs), health examination surveys (hes) and international surveys, some of which are publically available (such as the european social survey). we have presented the sources of morbidity data in appendix table a4 of the article. the third source of data were relative risks for the impact of smoking, overweight, physical inactivity and lack of social participation on mortality were collected from large reviews and meta-analyses. we have given reference to these studies in our own article. further detailed descriptions of the sources, questionnaires, distributions etc can be found in the final report of the euro-gbd-se project (www.euro-gbd-se.eu).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>