Table:
Item	Surgical (n=154)	Gamma Knife (n=82)
History	Febrile convulsion	72	63
Trauma	11	6
Diarrhea and dehydration	6	1
No particular	45	6
Undefined	22	6
Symptomatic sign(Aura)	Chest discomfort	77	32
Abdominal discomfort	18	25
Tension	24	0
Dizziness	11	6
Imagination disorder	10	13
None	14	6
Type	SPS	72	31
CPS	154	82
SGS	99	44
Disease course (year)	Range	2-10	3-10
Median	4.6	5.3
HS side	Left	66	32
Right	88	50

Transcribe the illustration into Markdown format.

| <COLSPAN=2> Item | Surgical (n=154) | Gamma Knife (n=82) | 
 | --- | --- | --- | --- | 
 | <ROWSPAN=5> History | Febrile convulsion | 72 | 63 | 
 | Trauma | 11 | 6 | 
 | Diarrhea and dehydration | 6 | 1 | 
 | No particular | 45 | 6 | 
 | Undefined | 22 | 6 | 
 | <ROWSPAN=6> Symptomatic sign(Aura) | Chest discomfort | 77 | 32 | 
 | Abdominal discomfort | 18 | 25 | 
 | Tension | 24 | 0 | 
 | Dizziness | 11 | 6 | 
 | Imagination disorder | 10 | 13 | 
 | None | 14 | 6 | 
 | <ROWSPAN=3> Type | SPS | 72 | 31 | 
 | CPS | 154 | 82 | 
 | SGS | 99 | 44 | 
 | <ROWSPAN=2> Disease course (year) | Range | 2-10 | 3-10 | 
 | Median | 4.6 | 5.3 | 
 | <ROWSPAN=2> HS side | Left | 66 | 32 | 
 | Right | 88 | 50 |