Candrilli SD, Davis KL, Iyer S. Impact of constipation on opioid use patterns, health care resource utilization, and costs in cancer patients on opioid therapy. J Pain Palliat Care Pharmacother. 2009 Sep 1;23(3):231-41.
Smith V, Mansfield CA, Clayton (Trantham) L. Valuing a homeland security policy: countermeasures for the threats from shoulder mounted missiles. J Risk Uncertain. 2009;38(3):215-43.