function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bariche, Michel & Fricke, Ronald', 1],
    ['Carneiro, Miguel & Martins, Rogélia & Landi, Monica', 1],
    ['Cohen, Daniel M.', 1],
    ['Cohen, Daniel M. & Atsaides, S. P.', 3],
    ['Danet, Frédéric', 2],
    ['Gilbert, Charles H.', 1],
    ['Goode, G. B. & Bean, T. H.', 2],
    ['Jordan, David Starr & Snyder, John Otterbein', 1],
    ['Linnaeus, Carolus', 3],
    ['Love, Milton S. & Bizzarro, Joseph J. & Cornthwaite, Maria', 1],
    ['Nurettin Meriç & Lütfiye Eryilmaz & Müfit Özulug', 1],
    ['Schwarzhans, Werner & Mors, Thomas & Engelbrecht, Andrea', 1],
    ['Simian, Gaëlle & Abraham, Daniel & Bailly, Nicolas', 1],
    ['Van Hinsbergh, Victor W. M. & Helwerda, Renate A.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);