Pitfalls in blood sampling. Influence of posture and venous occlusion time.
D000328:Adult; D001782:Blood Donors; D001800:Blood Specimen Collection / Q000379:methods*; D005069:Evaluation Studies as Topic; D006400:Hematocrit; D006438:Hemodilution; D006801:Humans; D011187:Posture; D014690:Venous Pressure