Gas Exchange Pulmonary Function Testing Market By System Type (Stationary, Portable), By Test Type (Spirometry, Gas diffusion test, Cardiopulmonary exercise testing (CPET)), By Application (Chronic obstructive pulmonary disease, Asthma, Chronic shortness of breath, Pulmonary fibrosis, Other applications), By End-use (Hospitals & clinics, Diagnostic centers, Homecare settings, Other end-users) - Growth, Share, Opportunities & Competitive Analysis, 2026 - 2034