Wu, X. et al. Determination of air pollution-related biomarkers of exposure in urine of travellers between Germany and China using liquid chromatographic and liquid chromatographic-mass spectrometric methods: A pilot study. Biomarkers 22, 1-27 (2017) Hosnijeh, F.S.* et al. Stability and reproducibility of simultaneously detected plasma and serum cytokine levels in asymptomatic subjects. Biomarkers 15, 140-148 (2010) Schmid, O. et al. Dosimetry and toxicology of inhaled ultrafine particles. Biomarkers 14, (Suppl.1), 67-73 (2009) Schnelle-Kreis, J. et al. Daily measurement of organic compounds in ambient particulate matter in Augsburg, Germany: New aspects on aerosol sources and aerosol related health effects. Biomarkers 14, (Suppl.1), 39-44 (2009)