| Field code | P_MAX_DON_AB |
| Field description | Maximum number of HLA-A, and -B typed donors |
| Field type | Numeric Length: 4 |
| Field rule | Default value is 0 |
| Dictionary field | Maximum requested donors (AB) (Maximum number of HLA-A, and -B typed donors) |
| EMDIS messages |
ALM_REQ PAT_UPD |
| WMDA XML fields related to dictionary field |