Source:http://linkedlifedata.com/resource/umls/id/C0439210
NCI: A measure of weight. A milligram is approximately 450,000 times smaller than a pound and 28,000 times smaller than an ounce.,NCI: The unit of mass equal to one thousandth of a gram or 1000 micrograms. One milligram equals approximately 0.015432 grain or 35.274 x 10E-6 ounce.(NCI),NCI: A metric unit of mass equal to one thousandth of a gram or 1000 micrograms. One milligram equals approximately 0.015432 grain or 35.274 x 10E-6 ounce.