function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Glaw, Frank & Köhler, Jörn & Riva, Ignacio De La', 13],
    ['Glaw, Frank & Scherz, Mark D. & Prötzel, David & Vences, Miguel', 1],
    ['Glos, Julian & Vences, Miguel', 10],
    ['Hutter, Carl R. & Lambert, Shea M. & Cobb, Kerry A.', 4],
    ['Köhler, Jörn & Glaw, Frank & Rosa, Gonçalo M.', 2],
    ['Köhler, Jörn & Glaw, Frank & Vences, Miguel', 2],
    ['Penny, Samuel G. & Andreone, Franco & Crottini, Angelica', 1],
    ['Raharivololoniaina, Liliane & Grosjean, Stéphane', 6],
    ['Randrianiaina, Roger-Daniel & Raharivololoniaina, Liliane', 7],
    ['Vences, Miguel & Andreone, Franco & Glos, Julian & Glaw, Frank', 2],
    ['Wollenberg, K. C. & Andreone, F. & Glaw, F. & Vences, M.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=49)',
    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);