TY - GEN AU - Portnoy,H D TI - The merits of the antisiphon device SN - 0148-396X PY - 1991///0320 KW - Cerebrospinal Fluid Shunts KW - instrumentation KW - Humans N1 - Publication Type: Comment; Letter UR - https://doi.org/10.1097/00006123-199101000-00028 ER -