1. Accuracy of Wrist Accelerometer During Nap Sleep in Subjects with a Variety of Sleep Efficiencies 
Tomoyuki Kawada, MD 
Journal of Pain and Symptom Management 
Volume 42, Issue 3, Pages e9-e10 (September 2011)
DOI: /j.jpainsymman
Copyright © 2011 U.S. Cancer Pain Relief Committee Terms and Conditions

2. Fig. 1
Relationship between sleep efficiency and accuracy using sleep polysomnography and actigraphy.
Journal of Pain and Symptom Management  , e9-e10DOI: ( /j.jpainsymman )
Copyright © 2011 U.S. Cancer Pain Relief Committee Terms and Conditions