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. Author manuscript; available in PMC: 2015 Oct 1.
Published in final edited form as: J Pain Symptom Manage. 2014 Apr 21;48(4):558–568. doi: 10.1016/j.jpainsymman.2013.10.025

Figure 1.

Figure 1

Statistical model of the study

Note. athe direct influence of the hemoglobin level on fatigue was allowed in this statistical model but its effect was not tested.