<|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 are from different studies whose authors may be contacted at their personal email addresses. - nava s (1998) rehabilitation of patients admitted to a respiratory intensive care unit. arch phys med rehabil 79: 849-854. - burtin c, clerckx b, robbeets c, ferdinande p, langer d, et al. (2009) early exercise in critically ill patients enhances short-term functional recovery. critical care medicine. pp. 2499-2505. - schweickert wd, pohlman mc, pohlman as, nigos c, pawlik aj, et al. (2009) early physical and occupational therapy in mechanically ventilated, critically ill patients: a randomised controlled trial. lancet. pp. 1874-1882. - routsi c, gerovasili v, vasileiadis i, karatzanos e, pitsolis t, et al. (2010) electrical muscle stimulation prevents critical illness polyneuromyopathy: a randomized parallel intervention trial with consumer summary]. critical care 2010 apr 28;14(2):r74. 26. - hanekom sd, louw q, coetzee a (2012) the way in which a physiotherapy service is structured can improve patient outcome from a surgical intensive care: a controlled clinical trial. crit care 16: r230. - denehy l, skinner eh, edbrooke l, haines k, warrillow s, et al. (2013) exercise rehabilitation for patients with critical illness: a randomized controlled trial with 12 months follow up. crit care 17: r156. - brummel ne, girard td, ely ew, pandharipande pp, morandi a, et al. (2014) feasibility and safety of early combined cognitive and physical therapy for critically ill medical and surgical patients: the activity and cognitive therapy in icu (act-icu) trial. intensive care med 40: 370-379.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>