Tumor necrosis factor α (TNFα, A), interleukin-6 (IL-6, B), interleukin-1β (IL-1β, C), lipid peroxidation (LPO, D), superoxide dismutase (SOD, E) and total nitric oxide (NO, F) levels in aortic tissue homogenates after a one-month exposure period to air (control) or waterpipe smoke (WPS). Data are means ± SEM (n=8).