Frontiers B cell immune repertoire sequencing in tobacco cigarette smoking, vaping, and chronic obstructive pulmonary disease in the COPDGene cohort Comparative study of lung toxicity of E cigarette ingredients to investigate E cigarette or vaping product associated lung injury ScienceDirect Health experts warn of vaping dangers and link to COPD E cigs: What You Need to Know if You Care for Patients with COPD Challenges in COPD Vaping increases risk for asthma, COPD, other lung diseases UPI.com