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  1. pdf2018MeShTreeHierarchy.pdf 
    https://www.nlm.nih.gov/mesh/2018/download/2018MeShTreeHierarchy.pdf
    ... Immunologic G12.300.500...........................................Vaccine Potency G12.350...........................................Histamine Release G12.400...........................................HIV Seronegativity G12.413...........................................Immune ...
  2. pdfNLM Technical Bulletin, no.129-140 
    https://www.nlm.nih.gov/.../nlmarchives/techbull/129-140-1980.pdf
    ... Congestlve/ETIOLOGY MH - Heart Rate/DRUG EFFECTS MH - Histamine Antagonlsts/PHARMACODYNAMICS MH - Injections, Intravenous MH -Male MH - ... G04505100 PUBLISHERS UNITED STATES HEALTH CARE SECURITY AND SAFETY MANAGEMENT l.MAY I960 — HEALTH CARE SECURITY AND ...