Research pointers: Unexplained differences in sex ratios at birth in Europe and North America.
Grech
Victor
V
Paediatric Department, St Luke's Hospital, Guardamangia MSD 09, Malta. victor.e.grech@magnet.mt
Savona-Ventura
Charles
C
Vassallo-Agius
P
P
D005060:Europe; D005260:Female; D006801:Humans; D008297:Male; D009656:North America; D012744:Sex Ratio