Jalava, P.I. Salonen, R.O. Pennanen, A.S. Sillanpää, M. Hälinen, A.I. Happo, M.S. Hillamo, R. Brunekreef, B. Katsouyanni, K. Sunyer, J. Hirvonen, M.-R., Heterogeneities in inflammatory and cytotoxic responses of RAW 264.7 macrophage cell line to urban air coarse, fine, and ultrafine particles from six European sampling campaigns, Inhalation Toxicology, (19), 213-225, 2007, 0895-8378, 1091-7691