function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Breure, Abraham S. H. & Tardy, Emmanuel', 1],
    ['Duan, Yi-Fan & Zhang, Libing', 1],
    ['Forster, Paul Irwin & Thongpukdee, A.', 1],
    ['Jarvis, Charlie', 5],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 3],
    ['Liao, Miao & Zeng, Si-Jin & Zeng, Lin-Ya & Yin, Hai-Jun', 2],
    ['Liede, Sigrid & Meve, Ulrich', 1],
    ['Linnaeus, Carolus', 5],
    ['Monteiro, Francisca & Costa, Esperança Da & Kissanga, Raquel', 1],
    ['Zhang, Cai-Fei & Onjalalaina, Uy. E. & Liao, Miao', 2],
    ['Zhang, Cai-Fei & Zhang, Dong-Juan & Liao, Miao & Hu, Guang-Wan', 1],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);