function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aistleitner, E.', 1],
    ['Jiang, Nan & Yang, Chao & Xue, Dayong & Han, Hongxiang', 13],
    ['Joshi, Rahul & Singh, Navneet & László, Gyula M. & Ahmad, Jalil', 3],
    ['Mironov, Vladimir G. & Zolotuhin, Vadim V.', 4],
    ['Zhuang, Hailing & Yago, Masaya & Owada, Mamoru & Wang, Min', 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);