Staden Ute, Niggemann Bodo, Stöver Brigitte, Bührer Christoph
Department of Pediatric Pneumology and Immunology, Charite Virchow Hospital, Humboldt University, Berlin, Germany.
Pediatr Int. 2004 Aug;46(4):487-9. doi: 10.1111/j.1442-200x.2004.01912.x.