. 2011 Jul 21;67(1):34–37. doi: 10.1016/S0377-1237(11)80008-0

Table 3.

Antigen matching stringency levels [23]

level	Antigen set	Antigen number
1	AB (O), Plus; {Ag-neg}	3+ Ag Neg^*
2	Level 1 Plus: c, C, e, E; K	+5
3	Level 2 Plus: Fy^a, Fy^b; Jk^a, Jk^b; S, s	+6
4	Level 3 Plus: k; M, N; Do^a, Do^b, Hy, Jo^a; Lu^a, Lu^b	+9

Ag -Neg- of corresponding alloantibody (ies) identified.