<|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 pct-level data used for the main analysis reported in table 2 are available from the following sources: health and social care information centre. statistics on nhs stop smoking services - england, april 2012 to march 2013 http://www.hscic.gov.uk/catalogue/pub12228 health and social care information centre. statistics on nhs stop smoking services - england, april 2011 to march 2012 http://www.hscic.gov.uk/catalogue/pub07011 health and social care information centre. statistics on nhs stop smoking services - england, april 2010 to march 2011 http://www.hscic.gov.uk/pubs/sss1011 health and social care information centre. statistics on nhs stop smoking services - england, april 2009 to march 2010 http://www.hscic.gov.uk/pubs/sss0910 office for national statistics. interim mid-2012 population estimates for primary care organisations in england by single year of age and sex http://www.ons.gov.uk/ons/rel/sape/health-geography-population-estimates/mid-2012/stb----health-geography---mid-2012.html office for national statistics. revised mid-2002 to mid-2010 population estimates for primary care organisations in england by single year of age and sex http://www.ons.gov.uk/ons/taxonomy/index.html?nscl=population+estimates+by+age+and+sex office for national statistics. cluster summaries: health areas (www.ons.gov.uk/ons/guide-method/geography/products/area-classifications/ns-area-classifications/index/cluster-summaries/index.html). the summary provider data used to calculate intervention-level activity reported in table 3 are not published. these data were provided by nhs west midlands healthcare commissioning services. this organization has been superseded by nhs midlands and lancashire commissioning support unit. please contact steven wyatt, nhs midlands and lancashire commissioning support unit, to request these data.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>