Gene Combination Relationship
GET /api/genecombinations/269/relationships/genes?format=api
{
    "data": [
        {
            "type": "Gene",
            "id": "ALMS1"
        },
        {
            "type": "Gene",
            "id": "BMP4"
        },
        {
            "type": "Gene",
            "id": "E2F4"
        },
        {
            "type": "Gene",
            "id": "SMAD4"
        },
        {
            "type": "Gene",
            "id": "TSHZ1"
        }
    ]
}