function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Amarasinghe, A. A. Thasun & Campbell, Patrick D.', 2],
    ['Bernstein, Justin M. & Bauer, Aaron M. & Mcguire, Jimmy A.', 1],
    ['Figueroa, Alex & Low, Martyn E. Y. & Lim, Kelvin K. P.', 3],
    ['Hoser, Raymond', 1],
    ['Kieckbusch, Max & Mader, Felix & Kaiser, Hinrich & Mecke, Sven', 2],
    ['Kieckbusch, Max & Mecke, Sven & Hartmann, Lukas', 2],
    ['Szyndlar, Zbigniew & Georgalis, Georgios L.', 1],
    ['Wagler, Johann Georg', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);