function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Horsfield, Thomas', 2],
    ['Illiger, Johann Karl Wilhelm', 1],
    ['Kumar Arya, Sumit & Gopi, Govindan Veeraswami', 1],
    ['Lichtenstein, Martin Heinrich Karl', 2],
    ['Mary & Croy', 21],
    ['Najer, Tomas & Sychra, Oldrich & Hung, Nguyen Manh', 3],
    ['Paperna, Ilan & Keong, Malcolm Soh Chu & May, Charlotte Yap Aye', 3],
    ['Temminck, Coenraad Jacob', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=35)',
    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);