Picozzi Giulia, Beccani Davide, Innocenti Florio, Grazzini Michela, Mascalchi Mario
Radiodiagnostic Section, Department of Clinical Physiopathology, University of Florence, Viale Morgagni 50134, Florence, Italy.
Thorax. 2007 Aug;62(8):744. doi: 10.1136/thx.2006.071415.