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[1]
BARSS VA, 1984, OBSTET GYNECOL, V64, P608
[8]
RAYBURN WF, 1982, OBSTET GYNECOL, V60, P148
[9]
SCHMIDT W, 1982, CLIN GENET, V22, P105
[10]
SELLER MJ, 1978, LANCET, V1, P660