Rubin DT, Mody R, Davis KL, Wang CC. Real-world assessment of therapy changes, suboptimal treatment and associated costs in patients with ulcerative colitis or Crohn's disease. Aliment Pharmacol Ther. 2014 May;39(10):1143-55. doi: 10.1111/apt.12727
Earnshaw SR, Klok RM, Iyer S, McDade C. Methylnaltrexone bromide for the treatment of opioid-induced constipation in patients with advanced illness--a cost-effectiveness analysis. Aliment Pharmacol Ther. 2010 Apr 1;31(8):911-21.
Zarkin GA, Bray JW, Davis KL, Babor TF, Higgins-Biddle JC. The costs of screening and brief intervention for risky alcohol use. J Stud Alcohol. 2003 Jan 1;64(6):849-57.