function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Baur, Hannes', 1],
    ['Burks, R. A.', 3],
    ['Dale-Skey, Natalie & Askew, Richard R. & Noyes, John S.', 10],
    ['Fan, Jun-Jie & Li, Cheng-De', 3],
    ['Gadallah, Neveen S. & Yefremova, Zoya A.', 3],
    ['Kosheleva, O. V.', 2],
    ['Shafiee, Sepideh & Hesami, Shahram & M, Seyed & Gheibi, Mehdi', 1],
    ['Swezey, O. H.', 1],
    ['Tao, Shu-xia & Huang, Kun & Tian, Jing & Ruan, Chang-chun', 2],
    ['Yefremova, Zoya A.', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);