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Circadian rest/activity rhythms in knee osteoarthritis with insomnia: a study of osteoarthritis patients and pain-free controls with insomnia or normal sleep.
Spira AP, Runko VT, Finan PH, Kaufmann CN, Bounds SC, Liu L, Buenaver LF, McCauley LM, Ancoli-Israel S, Smith MT. Spira AP, et al. Among authors: mccauley lm. Chronobiol Int. 2015 Mar;32(2):242-7. doi: 10.3109/07420528.2014.965314. Epub 2014 Oct 7. Chronobiol Int. 2015. PMID: 25290041 Free PMC article.