function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bürger, O.', 2],
    ['Dakin, W. J.', 1],
    ['Gibson, Ray', 1],
    ['Jones, Hugh D. & Sterrer, Wolfgang', 2],
    ['Kajihara, Hiroshi', 1],
    ['Maslakova, Svetlana A. & Norenburg, Jon L.', 12],
    ['Moore, Janet', 1],
    ['Moore, Janet & Gibson, Ray', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    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);