code: def _paired_load_script(work_bams, names, chrom, pairmode, items):
      
      paired = vcfutils.get_paired_bams(work_bams, items)
      bed_file = _get_regional_bed_file(items[0])
      if bed_file:
          return _paired_prep_targeted.format(case_file=paired.tumor_bam, case_name=paired.tumor_name,
                                              ctrl_file=paired.normal_bam, ctrl_name=paired.normal_name,
                                              num_cores=0, chrom=chrom, pairmode=pairmode, bed_file=bed_file)
      else:
          return _paired_prep.format(case_file=paired.tumor_bam, case_name=paired.tumor_name,
                                     ctrl_file=paired.normal_bam, ctrl_name=paired.normal_name,
                                     num_cores=0, chrom=chrom, pairmode=pairmode)
docs: Prepare BAMs for assessing CNVs in a paired tumor/normal setup.