Table 3. Changes of rabbit lip thickness in experimental groups and control group after injection of different mass concentrations of pingyangmycin at different time points ($\overline{x}\pm s$, mm).

Group	Before injection	21st day	28th day	35th day	60th day
8 mg/3 mL	5.68±0.25	3.48±0.16	3.34±0.16	2.65±0.11	2.52±0.14
8 mg/5 mL	5.62±0.15#	4.28±0.27*	4.12±0.19*	4.03±0.21*	3.58±0.11*
Control	5.60±0.16##	5.60±0.11**	5.61±0.11**	5.60±0.09**	5.57±0.10**

^##P>0.05 vs. 8 mg/3 mL group and 8 mg/5 mL group before injection; ^#P>0.05 vs. 8 mg/3 mL group before injection; **P<0.01 vs. 8 mg/3 mL group and 8 mg/5 mL group at the same time point; *P<0.01 vs. 8 mg/3 mL group at the same time point.