function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Breure, Abraham S. H.', 1],
    ['Breure, Abraham S. H. & Ablett, Jonathan D.', 4],
    ['Draparnaud, Jacques Philippe Raymond', 8],
    ['Haase, Martin & Meng, Stefan & Horsák, Michal', 1],
    ['Harzhauser, Mathias & Neubauer, Thomas A.', 1],
    ['Helwerda, Renate A.', 3],
    ['Lamarck, J. B. P. A. de M. de', 1],
    ['Pfeiffer, L.', 1],
    ['Röding, Peter Friedrich', 1],
    ['Salvador, Rodrigo & Simone, Luiz Ricardo L.', 1],
    ['Valdés, Ángel & Feliciano, Kendall & Malaquias, Manuel A. E.', 13]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=35)',
    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);