function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abraham, Phineas S.', 2],
    ['Bergh, Ludvig Sophus Rudolph', 1],
    ['Ekimova, Irina A. & Grishina, Darya Yu.', 2],
    ['Eliot, C. N. E.', 1],
    ['Fahey, Shireen J. & Valdés, Ángel', 1],
    ['Khalaf, Norman Ali Bassam & Khalaf, Ola', 1],
    ['Martynov, Alexander & Korshunova, Tatiana', 3],
    ['Martynov, Alexander & Korshunova, Tatiana & Sanamyan, Nadezhda', 7],
    ['Petit, Richard E.', 1],
    ['Tibiriçá, Yara & Pola, Marta & Cervera, Juan Lucas', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);