<|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: due to the restricted publication terms in the material transfer agreement of these studies, data included in this meta-analysis are only available upon request. requests for access to study data from step, phambili, hvtn 505 and hvtn 204 should be sent to the hvtn: vtn.research@hvtn.org or by completion of a form on the hvtn website: http://www.hvtn.org/en/science/submit-idea-proposal/idea-submission.html. requests for access to rv 172 data should be sent to dr. merlin robb (mrobb@hivresearch.org) at usmhrp. requests for access to iavi v001 data should be sent to dr. frances priddy (fpriddy@iavi.org) at iavi. once approved, data will be provided via secure data transfer protocols.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>