title: Tracer microspheres as a fecal marker in balance studies.
mesh_terms: D002849:Chromatography, Gas; D002857:Chromium; D002860:Chromium Radioisotopes; D005243:Feces / Q000032:analysis*; D006801:Humans; D008297:Male; D008863:Microspheres; D010087:Oxides; D012855:Sitosterols / Q000378:metabolism; D013326:Strontium Radioisotopes; D013997:Time Factors
chemical_list: D002860:Chromium Radioisotopes; D010087:Oxides; D012855:Sitosterols; D013326:Strontium Radioisotopes; D002857:Chromium