function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Altuna, Álvaro', 1],
    ['Baron-Szabo, Rosemarie C.', 2],
    ['Cairns, S. D.', 1],
    ['Cairns, Stephen D. & Häussermann, Verena & Försterra, Günter', 1],
    ['Cairns, Stephen D. & Polonio, Virginia', 1],
    ['Filander, Zoleka N. & Kitahara, Marcelo V. & Cairns, Stephen D.', 3],
    ['Moseley, Henry Nottidge', 2],
    ['Schejter, L. & Genzano, G. & Pérez, C. D. & Acuña, F.', 1],
    ['Studer, T.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    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);