Gene Relationship
GET /api/genes/HOXB3/relationships/variant_set?format=api
{
    "data": [
        {
            "type": "SmallVariant",
            "id": "2370"
        },
        {
            "type": "SmallVariant",
            "id": "2368"
        },
        {
            "type": "SmallVariant",
            "id": "2382"
        },
        {
            "type": "SmallVariant",
            "id": "3134"
        },
        {
            "type": "SmallVariant",
            "id": "3135"
        },
        {
            "type": "SmallVariant",
            "id": "3151"
        }
    ]
}