function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chaix, Christian & Martin, Jean-Paul Saint', 1],
    ['Fassbender, Nico & Stefanoudis, Paris V', 1],
    ['Hoeksema, Bert W.', 1],
    ['Licuanan, Wilfredo Y. & Aliño, Porfirio M.', 1],
    ['Vaughan, T. W.', 2],
    ['Wells, John W.', 1],
    ['Yabe, Hisakatsu & Sugiyama, Toshio', 2],
    ['van der Horst, C. J.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=10)',
    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);