public static void NavigateToNode(UITabBarController tabBar, Node node)
        {
            if (node.TumorId != AppDelegate.PickedTumor.Id)
            {
                FillNode(node);
                PickedTumor = node.Tumor;
            }

            ScrollingFlowchartViewController backup;
            int tabId;
            switch (node.NodeType)
            {
                case NodeTypes.CareProgramCalculator:
                case NodeTypes.CareProgram:
                    tabId = 4;
                    backup = CareProgramViewController;
                    break;
                default:
                    tabId = 0;
                    backup = CareFlowViewController;
                    break;
            }

            var nvc = tabBar.ViewControllers [tabId] as UINavigationController;
            var sfvc = nvc.TopViewController as ScrollingFlowchartViewController ?? backup;

            if (node.TumorId != AppDelegate.PickedTumor.Id)
            {
                AppDelegate.FillNode(node);
                AppDelegate.PickedTumor = node.Tumor;
            }

            sfvc.source.SelectedNode = node;
            sfvc.SetupFlowChart();
            sfvc.SnapToSection(sfvc.source.GetTreeLevel(node), true);
            tabBar.SelectedIndex = tabId;

        }