Authors: Philipp M Lepper; Sebastian R Ott; Hanno Hoppe; Christian Schumann; Uz Stammberger; Antonio Bugalho; Steffen Frese; Michael Schmücking; Norbert M Blumstein; Nicolas Diehm; Robert Bals; Jürg Hamacher Journal: Respir Care Date: 2011-01-27 Impact factor: 2.258