function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anikin, V. P.', 2],
    ['Ayres, W. O.', 2],
    ['Burmeister, H. C. C.', 1],
    ['Carneiro, Miguel & Martins, Rogélia & Landi, Monica', 1],
    ['Dybowski, B. I.', 1],
    ['Forsskål, Peter', 2],
    ['Gill, T. N.', 1],
    ['Girard, Charles Frédéric', 3],
    ['Jordan, David Starr', 1],
    ['Kessler, K. T.', 1],
    ['Linnaeus, Carolus', 4],
    ['Richardson, John', 1],
    ['Saad, Adib & Çiçek, Erdoğan & Esmaeili, Hamid Reza', 1],
    ['Simian, Gaëlle & Abraham, Daniel & Bailly, Nicolas', 1],
    ['Van Beneden, Pierre-Joseph', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);