Table 1.

Laser parameters and experimental conditions.

Laser spot diameters and exposure durations selected		Power levels selected (W)	Corresponding energy levels (J)	Peak radiant exposure ($\mathrm{J}/{\mathrm{cm}}^2$)	Group number	Involved animal numbers	Total exposure numbers
$1/e^2$ diameter (cm)	Exposure durations (s)
0.98	0.4	30.0	12.0	31.8	1#	4	200
		35.0	14.0	37.1
		40.0	16.0	42.4
		45.0	18.0	47.7
		50.0	20.0	53.0
0.98	1.0	12.0	12.0	31.8	2#	4	160
		15.0	15.0	39.8
		18.0	18.0	47.7
		21.0	21.0	55.7
0.98	3.0	3.0	9.0	23.9	3#	4	200
		4.0	12.0	31.8
		5.0	15.0	39.8
		6.0	18.0	47.7
		7.0	21.0	55.7
1.96	3.0	12.0	36.0	23.9	4#	4	160
		16.0	48.0	31.8
		20.0	60.0	39.8
		24.0	72.0	47.7