When once is enough.
D003257:Consumer Product Safety; D017743:Equipment Reuse / Q000191:economics / Q000592:standards* / Q000706:statistics & numerical data; D004993:Ethics, Nursing; D006801:Humans; D017053:Infection Control / Q000592:standards; D009330:Nebulizers and Vaporizers / Q000592:standards; D010344:Patient Advocacy; D017410:Practice Guidelines as Topic; D012307:Risk Factors; D006113:United Kingdom