Table 1.

Clinical summary of enrolled patients.

Case No.	Sex/ Age (y)	Duration of Disease (months)	Operation Time (min)	Blood Loss (ml)	Drainage Volume (ml)	Follow-up Time (months)	Operative Level
1	M/57	6	220	100	40	38.1	L4/5
2	F/59	36	165	100	50	37.9	L4/5
3	F/33	24	145	50	12	37.5	L4/5
4	F/53	120	185	50	5	33.0	L4/5
5	M/62	84	135	50	10	32.7	L4/5
6	M/72	36	155	70	30	31.5	L4/5