<|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. periodontal antibody measures used in this study were uniquely generated for this study and are in the supplementary files. for the remaining variables, the cohort studied was developed from a subset of participants in the washington heights-inwood columbia aging project (whicap, r01 ag037212), which has a defined data sharing protocol. specifically, de-identified project data can be be made available, upon request and after review and approval by the electronic document management system core and the whicap lead investigators, to researchers who wish to conduct analyses. requests for data access must be addressed to me in writing and must specify the data elements required. after approval, the edms core will prepare a sas or spss file containing these data elements via secure file transfer protocol (ftp) server. each authorized user will be given time-delimited, password-protected access to a folder on the server containing the file(s) he/she has been approved to analyze.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>