Gesundheitsrisiken von E Zigaretten: Weniger schdlich, aber nicht harmlos Stiftung Warentest A new study published in Nicotine & Tobacco Research found that those using e cigarettes alone were more than twice as likely to develop COPD than people who didn't use any tobacco products, Wie Vapen die Lungenfunktion beeintrchtigt ndd Medical COPD Risikofaktor Rauchen: Strategien zur Tabakentwhnung Rauchen