function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bryner, Rudolf', 1],
    ['Gaedike, Reinhard', 1],
    ['Gaedike, Reinhard & Kullberg, Jaakko', 1],
    ['Meyrick, Edward', 1],
    ['Philpott, Alfred', 1],
    ['Roh, Seung Jin & Shin, Young-Min & Lee, Dong-Jun', 1],
    ['Yang, Lin-Lin & Li, Hou-Hun', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=11)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);