Baxter and Althin dialalizers: (1) a-11, (2) a-15, (3) a-18, (4) a-22, (5) af-150, (6) All batches with the following product codes: (1) unidentified, (2) 237015, (3) 237018, (4) 237022, (5) 238015, (8) ax1500, (9) ax2200, (6) 238018, (7) 238022, (8 and 9) 239015, 239022, 239522