study view group comparison linkout - fix bug in computing comparison groups
study view group comparison linkout - fix bug in computing comparison groups

Signed-off-by: Adam Abeshouse <abeshoua@mskcc.org>

Former-commit-id: f0f8863de71e654cc6b07d579bac2cd8a535f408
cBioPortal/cbioportal-frontend,cBioPortal/cbioportal-frontend,alisman/cbioportal-frontend,alisman/cbioportal-frontend,cBioPortal/cbioportal-frontend,cBioPortal/cbioportal-frontend,alisman/cbioportal-frontend,alisman/cbioportal-frontend,alisman/cbioportal-frontend,alisman/cbioportal-frontend,cBioPortal/cbioportal-frontend,cBioPortal/cbioportal-frontend