<|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: this study makes use of control group data from the 1958 birth cohort and national blood service cohort, which was generated by the wellcome trust case control consortium. this data is available from http://www.wtccc.org.uk for researchers who meet criteria for access. regarding control data, readers should follow the application process described here: http://www.wtccc.org.uk/info/access_to_data_samples.html. the case group dna was provided by the health protection agency, which is now part of public health england. the materials transfer agreement between public health england and queens university belfast means that disclosure of case data requires permission from public health england. regarding the case data, readers should contact the corresponding author, declan bradley, at dbradley09@qub.ac.uk.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>