Figure 1From: Short-term effects of air pollution: a panel study of blood markers in patients with chronic pulmonary disease Time series of number concentrations of particles sized 0.01 to 0.1 μm (ultra fine particles, UFP) and mass concentrations of particles less than 10 μm in diameter (PM 10 ) with air temperature in Erfurt, Germany between October 2001 and May 2002.Back to article page