TY - JOUR T1 - Radicals in the church JF - European Respiratory Journal JO - Eur Respir J SP - 1069 LP - 1070 DO - 10.1183/09031936.04.00113404 VL - 24 IS - 6 AU - T.M.C.M. de Kok AU - J.G.F. Hogervorst AU - J.C.S. Kleinjans AU - J.J. Briedé Y1 - 2004/12/01 UR - http://erj.ersjournals.com/content/24/6/1069.abstract N2 - To the Editors: Public health is seriously threatened by exposure to ambient and indoor particulate matter (PM). Epidemiological studies have demonstrated that long-term exposure is associated with lung cancer and other pulmonary diseases 1. In vitro studies have demonstrated the involvement of polycyclic aromatic hydrocarbons (PAH), inflammation and oxidative stress in these adverse health effects 2–4. As free radicals are also known to play a crucial role in these processes, we developed an electron spin resonance (ESR)-based methodology to quantify the radical-generating capacity of PM. We applied this methodology in order to evaluate the effect of burning candles and incense, known sources of indoor air PM … ER -