Source:http://linkedlifedata.com/resource/umls/id/C1551074
NCI: A fundamental physical constant equal to the scalar value of positive electric charge carried by a single proton or equivalently, the negative charge carried by a single electron. It is used as a unit of electric charge in the system of atomic units. Elementary charge has a value of 1.602 176 487x10E-19 C in the SI system.,HL7V3.0: <p>1.60217733 x 10-19 C</p>