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Paper published by Dr Masao Ichiki:
Original Research
Effect of add-on therapy of tiotropium in COPD treated with theophylline
Tomotaka Kawayama, Tomoaki Hoshino, Masao Ichiki, Toru Tsuda, Masaharu Kinoshita, et al
International Journal of Chronic Obstructive Pulmonary Disease 2008, 3:137-147
Published Date: 7 March 2008