Is clinical research still too haphazard.
Steiner
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D000959:Antihypertensive Agents / Q000009:adverse effects*; D035843:Biomedical Research; D002986:Clinical Trials as Topic / Q000379:methods; D018738:Hexamethonium / Q000009:adverse effects*; D006801:Humans; D006973:Hypertension / Q000188:drug therapy*; D033281:Nontherapeutic Human Experimentation; D012107:Research Design
D000959:Antihypertensive Agents; D018738:Hexamethonium