TY  - RPRT
TI  - Identical twins too.
AU  - W A McFadzean
PY  - 1992
DO  - 10.1111/j.1365-2044.1992.tb01978.x
UR  - https://pubmed.ncbi.nlm.nih.gov/1536422/
ID  - 1536422
ER  -