function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Grazia, Jocélia & Schwertner, Cristiano F. & Greve, Caroline', 3],
    ['Grevea, Caroline & Schwertnerb, Cristiano F. & Grazia, Jocelia', 15],
    ['Ruschel, Tatiana Petersen & Guidoti, Marcus & Barcellos, Aline', 4],
    ['Silva, Valeria Juliete Da & Santos, Cleverson Rannieri Meira Dos', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=27)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 4, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);