function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Gilli, Alexander', 1],
    ['Jarvis, Charlie', 3],
    ['Merrill, Elmer Drew & Perry, Lily May', 4],
    ['Mille, Christian & Henderson, Rosa C. & Cazères, Sylvie', 1],
    ['Nacoulma, Blandine M. I. & Schmidt, Marco & Hahn, Karen', 4],
    ['Ridley, Henry Nicholas', 1],
    ['Schumann, Karl Moritz', 1],
    ['Suh, Soo-Jung', 2],
    ['Takeuchi, Wayne N.', 1],
    ['Turner, Ian M.', 1],
    ['Valeton, Theodoric', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);