Using snpsift to annotate vcf with dbsnp and Clinvar

Question

[whb]

snpsift website shows how to annotate variants with dbsnp (one file).

java -jar SnpSift.jar annotate dbSnp132.vcf variants.vcf > variants_annotated.vcf

but if I want annotate using mutiple files (e.g. dbsnp and clinvar), how should I do it?

Thanks