function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aistleitner, Eyjolf', 4],
    ['Badano, Davide & Pantaleoni, Roberto Antonio', 9],
    ['Canbulat, Savaş', 1],
    ['Dragan, S. V.', 1],
    ['Japaridze, Lasha-Giorgi & Makharadze, Giorgi', 2],
    ['Makarkin, V. N. & Solodovnikov, A. Yu. & Shchurov, V. I.', 1],
    ['Pantaleoni, Roberto A. & Loru, Laura', 4],
    ['Schaeffer, J. C.', 1],
    ['Tillier, Pierre', 2]
  ]);
  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);