title: Iceberg or pyramid?
authors.forename: Duncan
authors.initials: D
authors.lastname: Macrae
authors.forename: David L
authors.initials: DL
authors.lastname: Wessel
mesh_terms: D000959:Antihypertensive Agents / Q000627:therapeutic use; D002648:Child; D045462:Endothelium-Dependent Relaxing Factors / Q000627:therapeutic use; D019317:Evidence-Based Medicine; D006801:Humans; D006976:Hypertension, Pulmonary / Q000453:epidemiology / Q000503:physiopathology* / Q000517:prevention & control*; D009569:Nitric Oxide / Q000627:therapeutic use; D010879:Piperazines / Q000627:therapeutic use; D011687:Purines / Q000627:therapeutic use; D000068677:Sildenafil Citrate; D013450:Sulfones / Q000627:therapeutic use; D014665:Vasodilator Agents / Q000627:therapeutic use
chemical_list: D000959:Antihypertensive Agents; D045462:Endothelium-Dependent Relaxing Factors; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D014665:Vasodilator Agents; D009569:Nitric Oxide; D000068677:Sildenafil Citrate