TY - GEN AU - Winter,G D AU - Simpson,B J TI - Heterotopic bone formed in a synthetic sponge in the skin of young pigs SN - 0028-0836 PY - 1969///0822 KW - Animals KW - Biopsy KW - Osteogenesis KW - Polymers KW - adverse effects KW - Prostheses and Implants KW - Radiography KW - Skin KW - diagnostic imaging KW - Swine N1 - Publication Type: Journal Article UR - https://doi.org/10.1038/223088a0 ER -