This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
H.W. Lorenz
Wissenschaftliche Abteilung der B.A.T Cigaretten-Fabriken GmbH, Hamburg, Germany
F. Seehofer
Wissenschaftliche Abteilung der B.A.T Cigaretten-Fabriken GmbH, Hamburg, Germany