0 -> Mr
0 -> Mr
Mrrec -> Mr
Ma -> Mr
Mr + Se -> Mi
Mr -> Ma
Mr + Se -> 0
Mr -> 0
0 -> CD4
0 -> CD4
CD4rec -> CD4
CD4 + Se -> 0
CD4 -> 0
CD4 -> 0
0 -> CD8
0 -> CD8
CD8 -> 0
CD8 -> 0
Ma -> 0
Ma + Se -> 0
Mi + Si -> Se
Mi -> 0
Mi -> 0
0 -> Se
Se -> 0
Si -> 0
0 -> Si
0 -> Si
Si -> 0