function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Botero-Trujillo, Ricardo', 2],
    ['Botero-Trujillo, Ricardo & Ott, Ricardo & Mattoni, Camilo I.', 3],
    ['Carvalho, Leonardo S. & Botero-Trujillo, Ricardo', 3],
    ['Carvalho, Leonardo S. & Candiani, David F.', 1],
    ['Harms, Danilo & Dupérré, Nadine', 1],
    ['Muma, Martin H.', 2],
    ['Reyes, González & Ximena, Andrea & Corronca, José Antonio', 2],
    ['Simon, Eugène', 1],
    ['Souza, Maysa F. V. R. & Ferreira, Rodrigo L.', 3],
    ['de Mello-Leitão, Cândido Firmino', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=25)',
    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);