Fig. 4From: Oxidative DNA damage is involved in cigarette smoke-induced lung injury in ratsChanges of 8-OHdG levels in rats after exposure to cigarette smoke. a 8-OHdG levels in urine of rats after exposure to cigarette smoke for different weeks. b 8-OHdG levels in lymphocytes and lung tissue of rats exposed to cigarette smoke. *p < 0.05, compared with control groupBack to article page