Comparison of standard cardiopulmonary resuscitation vs. the combination of active compression-decompression cardiopulmonary resuscitation and an inspiratory impedance threshold device for out-of-hospital cardiac arrest. - Wolcke,B.B.; Mauer,D.K.; Schoefmann,M.F.; Teichmann,H.; Provo,T.A.; Lindner,K.H.; Dick,W.F.; Aeppli,D.; Lurie,K.G. (Circulation, 2003)