McCombs J S, Nichol M B, Johnson K A, Hay J W, Ebin V J, Lawrence G D, Schneider J S
Department of Pharmaceutical Economics and Policy, School of Pharmacy, University of Southern California, Los Angeles 90033, USA.
Am J Health Syst Pharm. 1995 Jun 1;52(11):1208-14. doi: 10.1093/ajhp/52.11.1208.