Table 1

 Genetic typing

Blood typing Twin 1 Twin 2
ABO groupO positiveO positive
Rhesus typeR1 R2R1 R2
DuffyFy (A negative/B positive)Fy (A negative/B positive)
KiddJK (A positive/B negative)JK (A positive/B negative)
LewisLe (A negative/B positive)Le (A negative/B positive)
MNSsM positiveM positive
N positiveN positive
S positiveS positive
s positives positive
HLA typingA1-B8-DR3-DR52-DQ2A1-B8-DR3-DR52-DQ2