Gene Relationship
GET /api/genes/NKX2-1/relationships/genecombination_set?format=api
{
    "data": [
        {
            "type": "GeneCombination",
            "id": "124"
        },
        {
            "type": "GeneCombination",
            "id": "391"
        },
        {
            "type": "GeneCombination",
            "id": "393"
        },
        {
            "type": "GeneCombination",
            "id": "398"
        },
        {
            "type": "GeneCombination",
            "id": "798"
        },
        {
            "type": "GeneCombination",
            "id": "799"
        }
    ]
}