Coley, R M Effect of needle size on pain and hematoma formation with subcutaneous injection of heparin sodium. [electronic resource] - Clinical pharmacy Sep 1987 - 725-7 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0278-2677 Subjects--Topical Terms: AgedFemaleHematoma--etiologyHeparin--administration & dosageHumansInjections, Subcutaneous--adverse effectsMaleMiddle AgedNeedlesPain--etiology