Fractional Exhaled Nitric Oxide Guided-Therapy in Chronic Obstructive Pulmonary Disease: A Stratified, Randomized, Controlled Trial Kang-Cheng Su, Hsin-Kuo Ko, Yi-Han Hsiao, Kun-Ta Chou, Yen-Wen Chen, Wen-Kuang Yu, Sheng-Wei Pan, Jia-Yih Feng, Diahn-Warng Perng

Effects of Pulmonary Hypertension on Exercise Capacity in Patients With Chronic Obstructive Pulmonary Disease Isabel Blanco, Beatriz Valeiro, Rodrigo Torres-Castro, Anael Barberán-García, Yolanda Torralba, Jorge Moisés, Laura Sebastián, Jeisson Osorio, José Rios, Elena Gimeno-Santos, Josep Roca, Joan A. Barberà

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