Gene Combination Relationship
GET /api/genecombinations/223/relationships/genes?format=api
{
    "data": [
        {
            "type": "Gene",
            "id": "CAPN1"
        },
        {
            "type": "Gene",
            "id": "CHAT"
        },
        {
            "type": "Gene",
            "id": "GALC"
        },
        {
            "type": "Gene",
            "id": "KIF1B"
        },
        {
            "type": "Gene",
            "id": "SOD1"
        }
    ]
}