TY - JOUR T1 - Clinical Immunology JF - Clinical Medicine JO - Clin Med SP - 360 LP - 362 DO - 10.7861/clinmedicine.6-4-360 VL - 6 IS - 4 A2 - , Y1 - 2006/07/01 UR - http://www.rcpjournals.org/content/6/4/360.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -