function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bignon, Arnaud & Cronier, Catherine', 2],
    ['Budil, Petr & Mergl, Michal', 4],
    ['Hughes, Helen & Thomas, Alan', 1],
    ['Mergl, Michal & Budil, Petr', 3],
    ['Noble, Paula & Aitchison, Jonathan C. & Danelian, Taniel', 1],
    ['Vanderlaan, Tegan A. & Ebach, Malte C.', 36]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=47)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);