Objective and subjective assessment of sleep in chronic low back pain patients compared with healthy age and gender matched controls: a pilot study.
BMC Musculoskelet Disord. 2009 Oct 2;10:122. doi: 10.1186/1471-2474-10-122.
BMC Musculoskelet Disord. 2009.
PMID: 19799778
Free PMC article.