TY  - RPRT
TI  - Is it normal for multiples to be smaller than singletons?
AU  - Isaac Blickstein
PY  - 2004
DO  - 10.1016/j.bpobgyn.2004.04.008
UR  - https://pubmed.ncbi.nlm.nih.gov/15279820/
ID  - 15279820
ER  -