Statement on first assisting.
D006801:Humans; D009741:Nursing Staff, Hospital / Q000706:statistics & numerical data*; D009871:Operating Room Nursing / Q000592:standards*; D009873:Operating Rooms; D011182:Postoperative Care; D011300:Preoperative Care; D012956:Societies, Nursing; D014481:United States; D000078329:Workforce