TY  - GEN
AU  - Friedman,E A
TI  - Letter: Determination of zygosity
SN  - 0028-4793
PY  - 1975///1120
KW  - Female
KW  - Histocompatibility Testing
KW  - Humans
KW  - Pregnancy
KW  - Twins
KW  - Twins, Dizygotic
KW  - Twins, Monozygotic
N1  - Publication Type: Journal Article
UR  - https://doi.org/10.1056/NEJM197510022931416
ER  -