RT Journal Article SR Electronic T1 Pott’s puffy tumour by Streptoccocus intermedius a rare complication of sinusitis JF BMJ Case Reports FD BMJ Publishing Group Ltd SP bcr0820114660 DO 10.1136/bcr.08.2011.4660 VO 2011 A1 Roberta Onesimo A1 Maria Scalzone A1 Piero Valetini A1 Massimo Caldarelli YR 2011 UL http://casereports.bmj.com/content/2011/bcr.08.2011.4660.abstract AB