Povidone-iodine ("Betadine") disinfectant as a source of error.
D000328:Adult; D001800:Blood Specimen Collection; D004202:Disinfectants; D005189:False Positive Reactions; D006801:Humans; D011188:Potassium / Q000097:blood*; D011205:Povidone / Q000031:analogs & derivatives; D011206:Povidone-Iodine
D004202:Disinfectants; D011206:Povidone-Iodine; D011205:Povidone; D011188:Potassium