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This is an update request for the document Size-Segregated Particle Number Concentrations and Respiratory Emergency Room Visits in Beijing, China by Arne Marian Leitte, Uwe Schlink, Olf Herbarth, Alfred Wiedensohler, Xiao-Chuan Pan, Min Hu, Matthia Richter, Birgit Wehner, Thomas Tuch, Zhijun Wu, Minjuan Yang, Liqun Liu, Susanne Breitner, Josef Cyrys, Annette Peters, H.-Erich Wichmann and Ulrich Franck

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