title: Inert markers.
mesh_terms: D002859:Chromium Isotopes; D003124:Colorimetry; D005769:Gastrointestinal Motility; D006018:Glycols; D006801:Humans; D007201:Indicator Dilution Techniques; D007408:Intestinal Absorption / Q000502:physiology; D007413:Intestinal Mucosa / Q000378:metabolism; D007422:Intestines / Q000502:physiology*; D007457:Iodine Radioisotopes; D008722:Methods; D010477:Perfusion; D010636:Phenols; D011095:Polyethylenes; D011205:Povidone; D013448:Sulfobromophthalein
chemical_list: D002859:Chromium Isotopes; D006018:Glycols; D007457:Iodine Radioisotopes; D010636:Phenols; D011095:Polyethylenes; D013448:Sulfobromophthalein; D011205:Povidone