A method and an apparatus for utilizing multiple carriers are disclosed. Cells are placed in the extra-capillary space to grow. The support frame includes a latching member extending from the forward end. The casting article can be multi-layered to obtain an article suitable for splinting applications. The dispersion stabilizer of the invention comprises a PVA-based resin having a 1,2-diol component at a side chain and a degree of saponification of 65 to 87% by mol.