title: Letter: Viral hepatitis: relapse or second attack?
mesh_terms: D000328:Adult; D001706:Biopsy; D003937:Diagnosis, Differential; D005260:Female; D006506:Hepatitis A / Q000150:complications / Q000175:diagnosis* / Q000276:immunology; D006509:Hepatitis B / Q000175:diagnosis / Q000276:immunology*; D006511:Hepatitis B Antigens / Q000302:isolation & purification*; D006801:Humans; D008099:Liver / Q000473:pathology
chemical_list: D006511:Hepatitis B Antigens