app/views/genes/_results_by_source_table_row.html.haml
%tr
%td
=link_to results_by_source_table_row.name, gene_by_category_path(results_by_source_table_row.name, sources: params[:sources])
-results_by_source_table_row.sources.each do |source_count|
%td
=source_count
%td
=results_by_source_table_row.sources.inject(0){ |sum, source_count| sum + source_count }