private void RemoveTreatmentButton_Click(object sender, EventArgs e)
        {
            VisitListForm form = new VisitListForm(3);

            form.ShowDialog();
        }
        private void DeleteVisitButton_Click(object sender, EventArgs e)
        {
            VisitListForm form = new VisitListForm(1);

            form.ShowDialog();
        }