function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Calegari, Bárbara B. & A., Pablo Lehmann & Reis, Roberto E.', 1],
    ['Calegari, Bárbara B. & Lehmann, Pablo & Reis, Roberto E.', 2],
    ['Calegari, Bárbara B. & Morlis, Walter Gill & Reis, Roberto E.', 1],
    ['Langeani, Francisco', 2],
    ['Ota, Renata Rúbia & Deprá, Gabriel de Carvalho', 3],
    ['Ribeiro, Alexandre C. & Carvalho, Murilo & Melo, Alex L. A.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=11)',
    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);