function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bragagnolo, Cibele', 3],
    ['Osvaldo Villarreal & Ludson Neves de Ázara', 4],
    ['Pinto-Da-Rocha, Ricardo & Manzanilla, Osvaldo Villarreal', 1],
    ['Pinto-Da-Rocha, Ricardo & Tourinho, Ana Lúcia', 1],
    ['Villarreal-Manzanilla, Osvaldo & Pinto-Da-Rocha, Ricardo', 6],
    ['Ázara, Ludson Neves De & Ferreira, Rodrigo Lopes', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);