<|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 data underlying the findings in this study are available upon request because of an ethical restriction. as mentioned in the ethics statement section of the manuscript, human participants gave written informed consent to be included in the study (comissió de bioètica de la universitat de barcelona; institutional review board registry irb00003099; assurance number: fwa00004225; http://www.ub.edu/recerca/comissiobioetica.htm). in their signed consent forms, all participants agree to collaborate by allowing the research group gens i ambient en la comprensió de la diversitat de la conducta humana i de la etiopatogenia de la malaltia mental, led by prof. dr. lourdes fañanás, member of the institute of biomedicine of the university of barcelona (ibub; address: departament de bioquímica i biologia molecular, facultat de biologia, universitat de barcelona. avda. diagonal, 645. 08028. barcelona, spain. phone: (+34) 934 021 525. www.ub.edu/ibub/). data requests may be addressed to the ibub using these contact details.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>