function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ayres, W. O.', 1],
    ['Boulenger, George Albert', 2],
    ['Britz, Ralf', 1],
    ['Gosse, J. - P.', 1],
    ['Laan, Richard Van Der & Eschmeyer, William N. & Fricke, Ronald', 1],
    ['Meunier, François J. & Gayet, Mireille', 3],
    ['Otero, Olga & Likius, Andossa & Vignaud, Patrick', 4],
    ['Résumé, Jacques Daget', 1],
    ['Smith, J. A.', 3],
    ['Steindachner, F.', 1],
    ['Ulrich K. Schliewen & Frank Schäfer', 10],
    ['Vaillant, L. L.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=29)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);