| http://www.w3.org/ns/prov#value | - A device for separating serum or plasma from a given volume of blood, comprising:a test tube having a peripheral sidewall with an inner peripheral surface and two opposite ends; a separating body disposed in said test tube, said separating body including a shell having a first recess which opens axially towards one of said ends, a second recess which opens axially towards the other of said ends, a
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