function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Jarvis, Charlie', 1],
    ['Kantvilas, Gintaras', 16],
    ['Lumbsch, H. Thorsten & Kantvilas, Gintaras & Parnmen, Sittiporn', 2],
    ['McMullin, Richard Troy & Simon, Andrew D. F. & Brodo, Irwin M.', 2],
    ['Zuo, Ya-Bo & Liu, Da-Le & Li, Cui-Xin & Chen, Yu-Hui', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);