function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Forster, Johann Reinhold & Forster, Johann George Adam', 1],
    ['Francis, George William', 1],
    ['Hartley, Thomas Gordon', 16],
    ['Jarvis, Charlie', 1],
    ['Lauterbach, Carl (Karl) Adolf Georg', 2],
    ['Lin, Yun & Bi, Hai-Yan & Sun, Jun & Sun, Qian', 2],
    ['Merrill, Elmer Drew & Perry, Lily May', 3],
    ['Ridley, Henry Nicholas', 1],
    ['Takeuchi, Wayne N.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);