function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ao, Guo-Fu & Shi, Shuang & Zheng, Min-Lin & Chen, Shi', 1],
    ['Beyarslan, Ahmet & Fischer, Maximilian', 2],
    ['Fischer, M. & Madl, M.', 3],
    ['Li, Xi-Ying & Achterberg, Cornelis van & Tan, Ji-Cai', 2],
    ['Madl, M. & Achterberg, C. Van', 2],
    ['Marinho, Cláudia F. & Costa, Valmir A. & Zucchi, Roberto A.', 1],
    ['Viereck, H. L.', 1],
    ['Wharton, Robert & Ward, Lauren & Miko, Istvan', 6],
    ['Wu, Qiong & Chen, Xue-Xin & He, Jun-Hua', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=25)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);