title: How close is close enough--how close is safe enough.
authors.forename: Heinz
authors.initials: H
authors.lastname: Kaiser
authors.forename: Michael
authors.initials: M
authors.lastname: Neuburger
mesh_terms: D001917:Brachial Plexus; D004558:Electric Stimulation; D006801:Humans; D009339:Needles; D009407:Nerve Block / Q000379:methods*; D010292:Paresthesia