Maia Avtandilashvili was appointed as a member of the National Council on Radiation Protection and Measurements (NCRP) Scientific Committee (SC) 6-13 on methods and models for estimating organ doses from intakes of radium, and Sergei Tolmachev will serve as a subject matter expert for the committee. SC-13 will prepare a commentary that will discuss approaches for determining organ doses following intakes of radium. It will also describe methods for assessing uncertainties associated with dose assessments, and for estimating doses to workers without measurement data, based upon doses to workers with measurement data and similar work histories.