False-positive haem detection due to povidone iodine.
D005189:False Positive Reactions; D006418:Heme / Q000032:analysis*; D006801:Humans; D009780:Occult Blood / Q000592:standards*; D011205:Povidone / Q000031:analogs & derivatives; D011206:Povidone-Iodine
D006418:Heme; D011206:Povidone-Iodine; D011205:Povidone