Research article Perinatal nicotine exposure induces asthma in second generation offspring Virender K Rehan, Jie Liu, Erum Naeem, Jia Tian, Reiko Sakurai, Kenny Kwong, Omid Akbari, John S Torday BMC Medicine 2012, 10:129 Conclusions "Germline epigenetic marks imposed by exposure to nicotine during pregnancy can become permanently programmed and transferred through…