function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ahrens, Dirk', 7],
    ['Ahrens, Dirk & Bezděk, Aleš', 7],
    ['Ahrens, Dirk & Liu, Wangang & Lukic, Daniel & Bai, Ming', 46],
    ['Ahrens, Dirk & Pham, Phu', 6],
    ['Bezděk, Aleš & Hájek, Jiří & Ascr, Biology Centre', 3],
    ['Bhunia, Debika & Gupta, Devanshu & Chandra, Kailash', 1],
    ['Bohacz, Claudia & Ahrens, Dirk', 8],
    ['Chandra, Kailash & Ahrens, Dirk & Bhunia, Debika', 1],
    ['Kaneko, Naoki & Wada, Kaoru', 2],
    ['Vitali, Francesco', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=82)',
    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);