Link straight to alternative browser if there's no 'r' parameter (e.g. on karyotype)
Link straight to alternative browser if there's no 'r' parameter (e.g. on karyotype)

Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode