function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Araya, Juan Francisco', 1],
    ['Blaschke, F.', 2],
    ['Conrad, Timothy Abbot', 2],
    ['Dijkstra, H. H. & Kilburn, R. N.', 3],
    ['Dijkstra, Henk H. & Beu, Alan G.', 4],
    ['Dijkstra, Henk H. & Janssen, Ronald', 1],
    ['Dijkstra, Henk H. & Maestrati, Philippe', 1],
    ['Dijkstra, Henk H. & Southgate, Paul C.', 1],
    ['Kilburn, Richard N. & Dijkstra, Henk H.', 1],
    ['Makiyama, Jirô', 1],
    ['Müller, Otto Friedrich', 2],
    ['Smith, Edgar A.', 9],
    ['Sowerby, James DeCarle', 3],
    ['Yoshimura, Taro', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=32)',
    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);