Lagged relationships among sleep disturbance, fatigue, and depressed mood during chemotherapy
Health Psychology (2013) - Comment
pubmed: 23437852  doi: 10.1037/a0031322  issn: 1930-7810  issn: 0278-6133 

Heather S. L. Jim, Paul B. Jacobsen, Kristin M. Phillips, Robert M. Wenham, William Roberts, Brent J. Small