Original Research

A US database study characterizing patients initiating a budesonide–formoterol combination versus tiotropium bromide as initial maintenance therapy for chronic obstructive pulmonary disease

Kern DM, Williams SA, Tunceli O, Wessman C, Zhou S, Pethick N, Elhefni H, Trudo F

International Journal of Chronic Obstructive Pulmonary Disease 2014, 9:775-783

Published Date: 18 July 2014