Table 1.

Solutions and combinations used in the experiments*

Agent	Concentration	Group number
		I	II	III	IV	V	VI	VII	VIII	IX
Betamethasone	7 mg/mL	X					X	X	X
Prednisolone	25 mg/mL		X							X
Lidocaine	10 mg/mL			X			X			X
Bupivacaine	5 mg/mL				X			X
Ropivacaine	7.5 mg/mL					X			X

* Different steroids and local anesthetics were used alone or in combinations.