Blood collection technique.
D001132:Arm / Q000098:blood supply; D001772:Blood Cell Count; D001774:Blood Chemical Analysis; D001800:Blood Specimen Collection / Q000295:instrumentation*; D002196:Capillaries; D006225:Hand / Q000098:blood supply; D006801:Humans; D008722:Methods; D009339:Needles; D011183:Postoperative Complications; D013594:Syringes; D014680:Veins