TABLE 1

Populations surveyed in this study

NameGeographic originNo. of linesYear collected
BGSeattle, WA101993
DemDemotte, NJ101993
NC6Durham County, NC101992
NC7Durham County, NC111992
RPIthaca, NY111993
GotGottingen, Germany101993
KzKaragandy, Kazakhstan111994
NFCAscot, England101993
NFEAscot, England121993
Pu2Prudka, Czechoslovakia101991
TammTammisaari, Finland101989