Purchasing raw materials.
D001672:Biocompatible Materials / Q000191:economics* / Q000600:supply & distribution; D003195:Computer Communication Networks; D003362:Cost-Benefit Analysis; D004864:Equipment and Supplies / Q000592:standards*; D006801:Humans; D008422:Materials Testing / Q000191:economics / Q000379:methods* / Q000592:standards; D011682:Purchasing, Hospital / Q000191:economics / Q000379:methods* / Q000592:standards; D011786:Quality Control