Event Qualification

Code	Description	Comment	Version
A	Abuse		added v2.3
B	Unexpected beneficial effect		added v2.3
D	Dependency		added v2.3
I	Interaction		added v2.3
L	Lack of expect therapeutic effect		added v2.3
M	Misuse		added v2.3
O	Overdose		added v2.3
W	Drug withdrawal		added v2.3