ng-Options Skip the First Element

<!DOCTYPE html>
<html>

<head>
    <title></title>
    <meta charset="utf-8" />
    <script src="Scripts/angular.js"></script>
    <script>
    var app = angular.module('myApp', []);
    app.controller('MyCtrl', function($scope)
    {
        $scope.all_slots = ["00", "5", "10", "15", "20", "25"];
    })
    </script>
</head>

<body ng-app="myApp" ng-controller="MyCtrl">
    <div>
        <select ng-model="minutes_per_slot" ng-options="slot as slot + ' minutes' for slot in all_slots.slice(4)"></select>
    </div>
</body>

</html>