title: [Effect of intravenously and intramuscularly administered vitamin PP on retinal vessels in humans].
mesh_terms: D000328:Adult; D006801:Humans; D007273:Injections, Intramuscular; D007275:Injections, Intravenous; D008875:Middle Aged; D009536:Niacinamide / Q000008:administration & dosage / Q000494:pharmacology*; D012171:Retinal Vessels / Q000187:drug effects*
chemical_list: D009536:Niacinamide
vernacular_title: Wpływ witaminy PP podawanej dozylnie i domieśniowo na naczynia siatkówki u człowieka