function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aoki, Jun-Ichi', 1],
    ['Chatterjee, Tapas & Pfingstl, Tobias & Pešić, Vladimir', 1],
    ['Ermilov, S. G. & Sandmann, D. & Marian, F. & Maraun, M.', 1],
    ['Ermilov, Sergey G. & OConnor, Barry M.', 3],
    ['Ermilov, Sergey G. & Rybalov, L. B.', 1],
    ['Ermilov, Sergey G. & Rybalov, Leonid B.', 1],
    ['Ermilov, Sergey G. & Rybalov, Leonid B. & Franke, Kerstin', 2],
    ['Hammer, Marie', 1],
    ['Revelo-Tobar, Harol', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    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);