function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Dolinskaya, I. V.', 2],
    ['Han, H. L. & Kononenko, V. S.', 12],
    ['Joos, R Enato & Fritsch, Dieter & Bryner, Rudolf', 1],
    ['Kiss, Ádám', 3],
    ['Knyazev, S. A. & Ivonin, V. V. & Ustjuzhanin, P. Ya.', 1],
    ['Schmidt, B. Christian & Wagner, David L.', 1],
    ['Volynkin, Anton V.', 1],
    ['Volynkin, Anton V. & Matov, Alexej Yu. & Han, Hui-Lin', 3],
    ['Volynkin, Anton V. & Matov, Alexej Yu. & Stüning, Dieter', 2],
    ['Volynkin, Anton V. & Saldaitis, Aidas', 1],
    ['Volynkin, Anton V. & Stüning, Dieter & Matov, Alexej Yu.', 3],
    ['Weidlich, Michael', 1],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=32)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);