function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bertolino, Marco & Costa, Gabriele & Bavestrello, Giorgio', 3],
    ['Bertolino, Marco & Costa, Gabriele & Reboa, Anna', 1],
    ['Calcinai, Barbara & Bavestrello, Giorgio & Bertolino, Marco', 1],
    ['Cavalcanti, Thaynã & Santos, George Garcia & Pinheiro, Ulisses', 4],
    ['Göcke, Christian & Janussen, Dorte', 3],
    ['Mitchell, Kirsty D. & Hall, Kathryn A. & Hooper, John N. A.', 2],
    ['Mothes, Beatriz & Campos, Maurício & Lerner, Cléa', 2],
    ['Mothes, Beatriz & De, Maurício A. & Campos', 2],
    ['Nascimento, Elielton & Pinheiro, Ulisses', 2],
    ['Rützler, Klaus & Piantoni, Carla & Van, Rob W. M.', 1],
    ['Salani, Sula & Lotufo, Tito Monteiro Da Cruz & Hajdu, Eduardo', 3],
    ['Topsent, Émile', 2],
    ['Van, Rob W. M.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=29)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);