Mucus Plugs as Precursors to Exacerbation and Lung Function Decline in COPD Patients Kwang Nam Jin; Hyo Jin Lee; Heemoon Park; Jung-Kyu Lee; Eun Young Heo; Deog Kyeom Kim; Hyun Woo Lee;

Chronic Respiratory Diseases as a Risk Factor for Herpes Zoster Infection Diego Morena; Sara Lumbreras; José Miguel Rodríguez; Carolina Campos; María Castillo; María Benavent; José Luis Izquierdo;

Patterns of Physical Activity Progression in Patients With COPD Maria Koreny; Heleen Demeyer; Marta Benet; Ane Arbillaga-Etxarri; Eva Balcells; Anael Barberan-Garcia; Elena Gimeno-Santos; Nicholas S. Hopkinson; Corina De Jong; Niklas Karlsson; Zafeiris Louvaris; Michael I. Polkey; Milo A. Puhan; Roberto A. Rabinovich; Robert Rodríguez-Roisin; Pere Vall-Casas; Ioannis Vogiatzis; Thierry Troosters; Judith Garcia-Aymerich;