function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Kraus, Fred', 3],
    ['Kraus, Fred & Kaiser, Hinrich & O\'Shea, Mark', 7],
    ['O\'Shea, Mark & Parker, Fred & Kaiser, Hinrich', 1],
    ['O’Shea, Mark & Herlihy, Brian & Paivu, Blaise & Parker, Fred', 1],
    ['Roberts, Jackson R. & Iova, Bulisa & Austin, Christopher C.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);