title: Improved distal tip of a double-lumen cytology brush.
authors.forename: W B
authors.initials: WB
authors.lastname: Silverman
mesh_terms: D001706:Biopsy; D003585:Cell Biology / Q000295:instrumentation*; D002760:Cholangiopancreatography, Endoscopic Retrograde / Q000379:methods; D002779:Cholestasis / Q000473:pathology*; D006801:Humans