Retraction: Use of tiotropium bromide for pre-operative treatment in chronic obstructive pulmonary disease patients: comparison with oxitropium bromide.
Matsuyama
Wataru
W
Mitsuyama
Hideo
H
Koreeda
Yoshimizu
Y
Higashimoto
Ikkou
I
Osame
Mitsuhiro
M
Arimura
Kimiyoshi
K