The units kilogram, gram, milligram, microgram, and smaller are commonly used for measurement of mass. Prednisone dosed at 1 milligram/kilogram of body weight daily is generally recommended. T-2 mycotoxin has an of approximately 1 milligram per kilogram of body weight. It is measured in units of mg/L (milligram per litre). It is also available in 10 milligram vials for intramuscular injection. One can obtain milligram quantities of fullerenes with 80 atoms or more. Today, polonium is usually produced in milligram quantities by the neutron irradiation of bismuth. The estimated human intake of germanium is 1 milligram per day. It is obtained as the oxide or chloride, in milligram quantities. Humans typically consume about a milligram of holmium a year. Humans consume 1 milligram of erbium a year on average. It will be available in 20 milligram and 50 milligram vials.