<|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. all the data sets in this study are available as indicated below. the copdgene data upon which these findings are based are available through the dbgap study page for copdgene: http://www.ncbi.nlm.nih.gov/projects/gap/cgi-bin/study.cgi?study_id=phs000179.v3.p2. there is a link from this page (authorized access section) to dbgap's controlled access system that allows someone to request the data. the accession number for this data is phs000179.v3.p2. the spiromics study can provide datasets upon submission and approval of the data access request form as per the study policy. available data and forms can be found at the following link: http://www.cscc.unc.edu/spir/public/docfilter.php?study=spir&filter_type=public. a list of available datapoints is posted on the study website under the heading no committee association. for this study, we utilized data from the following forms: anthropometry form, baseline exacerbation questionnaire, baseline medical history form, demographic form, modified medical research council dyspnea scale, respiratory disease and smoke exposure questionnaire, spirometry data form, and six minute walk test form. requested data only was assembled into an appropriate dataset by the central data coordinating center and provided to the investigators of this study. for requests, investigators should submit the data access and request form found under the heading data sharing subcommittee and forward to spiromics@unc.edu such that an appropriate dataset can be assembled by the data coordinating center, in the same way as was provided to the authors of this study.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>