function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Borges, Paulo A. V. & Gaspar, Clara', 4],
    ['Dames, W.', 2],
    ['Fritsch, Antonin', 1],
    ['Heiss, Ernst & Eckelt, Andreas & Lederwasch, Manfred', 7],
    ['Li, Zhaoxu & Ren, Guodong', 3],
    ['Royo, J. & Gomez, J.', 2],
    ['Sowerby (2), G. B.', 1],
    ['Thomson, Charles Wyville', 1],
    ['Vinokurov, Nikolai N. & Cai, Wanzhi & Luo, Zhaohui', 1],
    ['Withers, T. H.', 1],
    ['Woodward, H.', 1],
    ['Yasunaga, Tomohide & Yamada, Kazutaka', 5],
    ['Yasunaga, Tomohide & Yamada, Kazutaka & Ohno, Tomohide', 3],
    ['Zittel, Karl Alfred von', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=33)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);