Feltner D, Hill C, Lenderking W, Williams VS, Morlock R. Development of a patient-reported assessment to identify placebo responders in a generalized anxiety disorder trial. J Psychiatr Res. 2009 Oct;43(15):1224-30.
Morlock RJ, Williams VS, Cappelleri JC, Harness J, Fehnel SE, Endicott J, Feltner D. Development and evaluation of the Daily Assessment of Symptoms – Anxiety (DAS-A) Scale to evaluate onset of symptom relief in patients with generalized anxiety disorder. J Psychiatr Res. 2008 Oct;42(12):1024-36.
Rothman KJ. Estimation of confidence limits for the cumulative probability of survival in life-table analysis. J Chronic Dis. 1978 Jan 1;31(8):557-60. doi: 10.1016/0021-9681(78)90043-7
Rothman KJ. A pictorial representation of confounding in epidemiologic studies. J Chronic Dis. 1975 Feb;28(2):101-8.
Rothman KJ, Keller AZ. The effect of joint exposure to alcohol and tobacco on risk of cancer of the mouth and pharynx. J Chronic Dis. 1972 Dec;25(12):711-6.