TY  - GEN
AU  - Makin,A P
AU  - MacLeod,A D
TI  - Position of antireflux valves
SN  - 0003-2409
PY  - 1998///0612
KW  - Analgesia, Patient-Controlled
KW  - instrumentation
KW  - Equipment Design
KW  - Humans
N1  - Publication Type: Letter
ER  -