app/views/genes/_by_source_table.html.haml
.well
%table#table-by-source.table.table-striped.table-bordered(cellpadding="0" cellspacing="0" border="0")
%thead
%tr
%th Name
-gene.source_db_names.each do |name|
%th=name
%th Count
%tbody
=render partial: 'genes/by_source_table_row', collection: gene.grouped_names