The role of cigarette smoke induced pulmonary vascular endothelial cell apoptosis in COPD Respiratory Research Springer Nature Link Older users of e cigarettes at greater risk of respiratory illness, study suggests CUNY Graduate School of Public Health & Health Policy E cigarettes 'increase risk of infection by damaging hundreds of genes in immune system' The Mirror E liquide avec nicotine 6 mg ml Cdiscount Electronic cigarette use and its association with asthma, chronic obstructive pulmonary disease (COPD) and asthma COPD overlap syndrome among never cigarette smokers