<|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 were collected and maintained by third parties. for ethical and legal reasons we are not allowed to distribute them. however, it is possible to contact the twinsuk and lifelines studies directly to request access to data as specified on their respective websites: the twinsuk data is available on request by contacting the twin research unit at www.twinsuk.ac.uk/data-access/submission-procedure. the data cannot be released without assessment by a steering committee with transfer agreements as the phenotypic data can be sensitive and may in some cases lead to the identification of the twins involved in the study. these procedures have been put in place by the local ethics committee and the wellcome trust. the lifelines data is available by contacting the lifelines research office (llscience@umcg.nl)(https://www.lifelines.nl/lifelines-research/access-tolifelines/ application-process). the data cannot be released without assessment by the lifelines scientific committee with transfer agreements since the phenotypic data can be sensitive and has the potential in some cases to lead to the identification of individuals involved in the study. these procedures have been put in place by the lifelines scientific board and local ethic committees. for more information see: scholtens, s., n. smidt, m.a. swertz, s.j.j. bakker, a. dotinga, j.m. vonk, f. van dijk, s.k.r. van zon, c. wijmenga, b.h.r. wolffenbuttel & r. p. stolk. (2014). cohort profile: lifelines, a three-generation cohort study and biobank, international journal of epidemiology, 1-9.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>