Content Type Journal ArticleCategory CE - Medical IllustrationDOI 10.1007/s11739-009-0322-8Authors Sidhartha Sinha, North Middlesex University Hospital NHS Trust London UKArunthathi Pushparajasekaran, North Middlesex University Hospital NHS Trust London UKRudy Borgstein, North Middlesex University Hospital NHS Trust London UKDavid L. Stoker, North Middlesex University Hospital NHS Trust London UK Journal Internal and Emergency MedicineOnline ISSN 1970-9366Print ISSN 1828-0447 (Source: Internal and Emergency Medicine)