Task: Answer Verification
Input (English): Question: Does two different doses of caudal neostigmine co-administered with levobupivacaine produce analgesia in children?
Answer: Caudal neostigmine in doses of 2 and 4 microg.kg(-1) with levobupivacaine extends the duration of analgesia without increasing the incidence of adverse effects, and 2 microg.kg(-1) seems to be the optimal dose, as higher dose has no further advantages.
Output (English): yes