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    ($ipairs{$fk}{$dline}{'head'}, $ipairs{$fk}{$dline}{'effect'}, $ip
+airs{$fk}{$dline}{'pvalue'}) = $ldata{$dline} =~ /^(.*)\s+(\d\.\d+)\s
++\d\.\d+\s+(\d\.\d+)$/;

    ( @{ $ipairs{$fk}{$dline} }{qw/head effect pvalue/} ) = $ldata{$dl
+ine} =~ /^(.*)\s+(\d\.\d+)\s+\d\.\d+\s+(\d\.\d+)$/;

    $pvt = $ipairs{$fk}{$pair};
    if($pvt->{'pvalue'}){
...
        $n++;
        $z+= qnorm($pvt->{'pvalue'});
    }