<|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: morbidity and disability data are from the fourth national health examination survey whose authors may be contacted at national health examination survey office, health systems research institute (address 126 moo 4, bamrasnaradura infectious diseases institute, soi tiwanon14, tiwanon road, amphoe mueang nonthaburi, nonthaburi, thailand 11000; tel (66)29659616; fax (66)29659617). mortality data are from the thai vital registration system whose authors may be contacted at bureau of policy and strategy, ministry of public health (address bureau of policy and strategy, office of permanent secretary, ministry of public health, tiwanon road, amphoe mueang nonthaburi, nonthaburi, thailand 11000; tel (66)25901000; fax (66)25901174; http://bps.moph.go.th/contact).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>