| http://www.w3.org/ns/prov#value | - Referring to FIG. 1, the backflush fluid source 32 comprises a container, bag or other suitable source of a backflush fluid, for example, a normal saline solution, or a source of normal fresh or fresh frozen or treated autologous plasma from which toxins, high molecular weight proteins and/or other undesirable contaminants have been removed.
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