title: Response.
authors.affiliation: Safety and Epidemiology, HealthCore, Inc, Andover, MA. Electronic address: slanes@healthcore.com.
authors.forename: Stephan F
authors.initials: SF
authors.lastname: Lanes
mesh_terms: D005260:Female; D017048:Health Care Costs / Q000706:statistics & numerical data*; D006470:Hemorrhage / Q000453:epidemiology*; D006801:Humans; D008297:Male; D019152:Paracentesis / Q000009:adverse effects*; D011030:Pneumothorax / Q000453:epidemiology*; D011677:Punctures / Q000009:adverse effects*; D013909:Thorax; D018084:Ultrasonography, Interventional / Q000379:methods*