Authors: Chodosh, S Flanders, JS Kesten, S Serby, CW Hochrainer, D Witek, TJ

Citation: S. Chodosh et al., Effective delivery of particles with the HandiHaler (R) dry powder inhalation system over a range of chronic obstructive pulmonary disease severity, J AEROSOL M, 14(3), 2001, pp. 309-315

Authors: Littner, MR Ilowite, JS Tashkin, DP Friedman, M Serby, CW Menjoge, SS Witek, TJ

Citation: Mr. Littner et al., Long-acting bronchodilation with once-daily dosing of tiotropium (Spiriva)in stable chronic obstructive pulmonary disease, AM J R CRIT, 161(4), 2000, pp. 1136-1142

Authors: Casaburi, R Briggs, DD Donohue, JF Serby, CW Menjoge, SS Witek, TJ

Citation: R. Casaburi et al., The spirometric efficacy of once-daily dosing with tiotropium in stable COPD - A 13-week multicenter trial, CHEST, 118(5), 2000, pp. 1294-1302

Authors: Dorinsky, PM Reisner, C Ferguson, GT Menjoge, SS Serby, CW Witek, TJ

Citation: Pm. Dorinsky et al., The combination of ipratropium and albuterol optimizes pulmonary function reversibility testing in patients with COPD, CHEST, 115(4), 1999, pp. 966-971

Authors: Friedman, M Serby, CW Menjoge, SS Wilson, JD Hilleman, DE Witek, TJ

Citation: M. Friedman et al., Pharmacoeconomic evaluation of a combination of ipratropium plus albuterolcompared with ipratropium alone and albuterol alone in COPD, CHEST, 115(3), 1999, pp. 635-641

Authors: Witek, TJ Souhrada, JF Serby, CW Disse, B

Citation: Tj. Witek et al., Tiotropium (Ba 679) Pharmacology and early clinical observations, LUNG BIOL H, 134, 1999, pp. 137-152