<|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: data are from the included studies whose authors may be contacted at doi: 10.1006/gyno.1997.4914, doi: 10.1097/pas.0000000000000454, doi: 10.1002/ijc.25629, doi: 10.1016/j.ygyno.2004.07.026, doi: 10.1007/s13277-013-0955-0, doi: paor.2006.12.3.0153, doi: 10.1097/01.pai.0000213118.81343.32, int j gynecol pathol. 2006 jan;25(1):22-9. from pubmed, web of science and embase, chinese articles from sichuan medical journal (05):405-406,maternal and child health care of china (22):3168-3170., master thesis: qingdao university. hin j clin oncol rehabil (01):6-8., master thesis: china medical university. from cnki database.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>