The VASOGRADE derived from previously published risk charts and consists of @ categories : VASOGRADE-Green ( modified Fisher scale @ or @ and World Federation of Neurosurgical Societies scale -LSB- WFNS -RSB- @ or @ ) ; VASOGRADE-Yellow ( modified Fisher @ or @ and WFNS @-@ ) ; and VASOGRADE-Red ( WFNS @ or @ , irrespective of modified Fisher grade ) .