function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abé, Hiroshi & Etemadi, Isa', 1],
    ['BARTSCH, I.', 1],
    ['Bartsch, I.', 1],
    ['Bartsch, Ilse', 4],
    ['Chatterjee, Tapas', 15],
    ['Chatterjee, Tapas & Durucan, Furkan', 11],
    ['Chatterjee, Tapas & Pfingstl, Tobias & Pešić, Vladimir', 6],
    ['Durucan, Furkan', 2],
    ['Durucan, Furkan & Paz, Juan Carlos De La', 1],
    ['Pepato, Almir R. & Da Rocha, Carlos E. F.', 1],
    ['Pepato, Almir R. & Silveira, Paulo Sergio Amorim Da', 3],
    ['Smit, H.', 1],
    ['Willmann, C.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=50)',
    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);