PCA demand buttons.
Southall
L
L
Macintyre
P E
PE
Semple
T G
TG
D000700:Analgesics / Q000008:administration & dosage*; D004867:Equipment Design; D006801:Humans; D007275:Injections, Intravenous / Q000295:instrumentation*; D012651:Self Medication
D000700:Analgesics