function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Adam, William', 1],
    ['Amor, Michael D. & Hart, Anthony M.', 1],
    ['Cuvier, Georges', 1],
    ['Gleadall, Ian G.', 1],
    ['Guerrero-Kommritz, Jürgen & Camelo-Guarin, Stefany', 2],
    ['Huffard, Christine L.', 4],
    ['Kaneko, Natsumi & Kubodera, Tsunemi', 2],
    ['O\'Shea, Steve', 3],
    ['O’Brien, Caitlin E. & Bennice, Chelsea O. & Leite, Tatiana', 1],
    ['Reid, Amanda L. & Wilson, Nerida G.', 1],
    ['Roper, Clyde F. E. & Gutierrez, A. & Vecchione, M.', 1],
    ['Sasaki, Madoka', 1],
    ['Taki, Iwao', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    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);