function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bodner, L. & Freidberg, A.', 12],
    ['Boulenger, George Albert', 1],
    ['Harym, Younes El & Korneyev, Valery', 2],
    ['Kner, R.', 1],
    ['Lütken, Christian Frederik', 1],
    ['Meigen, Johann Wilhelm', 1],
    ['Spix, J. B. von & Agassiz, Jean Louis Rodolphe', 4],
    ['Steindachner, F.', 2],
    ['Sykes, W. H.', 1],
    ['Vaillant, L. L.', 1],
    ['W. Peters', 3],
    ['Weyenbergh, H.', 1],
    ['de Spix, J. B. & Agassiz, L.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    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);