title: Letter: Beta-blockers in the treatment of chronic simple glaucoma.
mesh_terms: D004088:Dihydroergotoxine / Q000627:therapeutic use*; D004877:Ergoloid Mesylates / Q000627:therapeutic use*; D005901:Glaucoma / Q000188:drug therapy*; D006801:Humans
chemical_list: D004088:Dihydroergotoxine; D004877:Ergoloid Mesylates