function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Calcinai, Barbara & Belfiore, Giuseppe & Pica, Daniela', 1],
    ['Carter, H. J.', 1],
    ['Cruz-Barraza, José Antonio & Carballo, José Luis', 2],
    ['Diaz, M. C. & Soest, Van & Rützler, K. & Guzman, H. M.', 2],
    ['Gugel, Jochen & Wagler, Marit & Brümmer, Franz', 2],
    ['Göcke, Christian & Janussen, Dorte', 4],
    ['Pinheiro, Ulisses Dos S. & Hajdu, Eduardo & Custódio, Márcio R.', 18],
    ['Röding, Peter Friedrich', 2],
    ['Rützler, Klaus & Piantoni, Carla & Van, Rob W. M.', 6],
    ['Van, Rob W. M.', 3],
    ['Van, Rob W. M. & Kaiser, Kirstie L. & Syoc, Robert Van', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=42)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);