title: Warning: Simplate II, lack of standardization in standardized bleeding time devices--reply: lot-to-lot variation in ejection force has been rectified.
authors.forename: W P
authors.initials: WP
authors.lastname: Houdijk
mesh_terms: D016477:Artifacts; D001780:Blood Coagulation Tests / Q000295:instrumentation* / Q000592:standards; D004867:Equipment Design; D006801:Humans