handle the case when a candidate region doesn't have annotate coverage by replacing period placeholder with an integer value of 0.
handle the case when a candidate region doesn't have annotate coverage by replacing period placeholder with an integer value of 0.

EichlerLab/pacbio_variant_caller,EichlerLab/pacbio_variant_caller,EichlerLab/pacbio_variant_caller,EichlerLab/pacbio_variant_caller,EichlerLab/pacbio_variant_caller