title: Source of error on using a positive-displacement pipette in hepatitis B testing.
mesh_terms: D004209:Disposable Equipment; D005189:False Positive Reactions; D005898:Glass; D006514:Hepatitis B Surface Antigens / Q000032:analysis*; D006801:Humans; D010969:Plastics
chemical_list: D006514:Hepatitis B Surface Antigens; D010969:Plastics