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. 2021 Sep 26;15(2):79–90. doi: 10.1177/1753495X211011913

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Figure 2. — Proposed algorithm for investigation of suspected HLH in pregnancy. AFB: acid-fast bacillus; ALT: alanine aminotransferase; ANA: antinuclear antibody; ANCA: anti-neutrophil cytoplasmic antibody; AST: aspartate aminotransferase; C: complement; CMV: cytomegalovirus; COAG: coagulation studies; CRP: c-reactive protein; CT: computerised tomography; dsDNA: double-stranded DNA; EBV: Epstein-Barr virus: ENA: extractable nuclear antigen; ESR: erythrocyte sedimentation rate; FBC: full blood count; HAV IgM: hepatitis A immunoglobulin M; HBcAb: hepatitis B core antibody; HBsAg: hepatitis B surface antigen; HCV: hepatitis C virus; HEV: hepatitis E virus; HHV: human herpesvirus; HIV: human immunodeficiency virus; HSV: herpes simplex virus; Igs: immunoglobulins; LDH: lactate dehydrogenase; LFTs: liver function tests; MC&S: microscopy culture and sensitivity; MRI: magnetic resonance imaging; NK: natural killer; PCR: polymerase chain reaction; RF: rheumatoid factor; sCD25: soluble CD25; sIL-2R: soluble interleukin-2 receptor; TG: triglyceride; US: ultrasound.