5. Corresponding author:
Prof. Dr. med. Kirsten Beyer
Charité Universitätsmedizin Berlin,
Department of Pediatric Respiratory Medicine, Immunology and Critical
Care Medicine Augustenburger Platz 1,
D-13353 Berlin, Germany
Phone: +49-(0)30-450 559054; FAX: +49-(0)30-450559951
E-Mail:
kirsten.beyer@charite.de
6. Word count: 2488 ; Tables: 2; Figures: 4
7. Material in the electronic repository: none