1. Relationship of hemoglobin levels to fatigue and cognitive functioning among cancer patients receiving chemotherapy 
Paul B Jacobsen, PhD, Linda L Garland, MD, Margaret Booth-Jones, PhD, Kristine A Donovan, PhD, Christina L Thors, PhD, Erin Winters, MA, Edward Grendys, MD 
Journal of Pain and Symptom Management 
Volume 28, Issue 1, Pages 7-18 (July 2004)
DOI: /j.jpainsymman

2. Figure 1
Changes in cognitive performance based on degree of hemoglobin decline among participants with decline in hemoglobin to ≤12 g/dL.
Journal of Pain and Symptom Management  , 7-18DOI: ( /j.jpainsymman )