function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Balzan, L.', 3],
    ['Beier, Max', 38],
    ['Borges, Paulo A. V. & Gaspar, Clara', 4],
    ['Chamberlin, Joseph Conrad', 5],
    ['Ellingsen, Edvard', 7],
    ['Gardini, Giulio', 109],
    ['Hadži, Jovan', 15],
    ['Hoff, C. Clayton', 5],
    ['Mahnert, Volker', 5],
    ['Novák, János', 11],
    ['Reboleira, Ana Sofia P. S. & Pérez, Antonio José', 5],
    ['Redikorzev, V.', 7],
    ['Simon, Eugène', 4],
    ['Tullgren, Albert', 6],
    ['Zaragoza, Juan A. & Pérez, Toni', 7],
    ['Other (21)', 33]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=264)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);