Testtabel

↓ existing	add →	Ca	Ga	La	Li	To
Ca	Carbamazepine	—	CaGa	CaLa	CaLi	CaTo
Ga	Gabapentin	GaCa	—	GaLa	GaLi	GaTo
La	Lamotrigine	LaCa	LaGa	—	LaLi	LaTo
Li	Lithium	LiCa	LiGa	LiLa	—	LiTo
To	Topiramate	ToCa	ToGa	ToLa	ToLi	—