function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bernardes, Jorge L. C. & Grazia, Jocélia & Barcellos, A Line', 4],
    ['Castro-Huertas, Valentina & Grazia, Jocelia & Forero, Dimitri', 2],
    ['Ruschel, Tatiana Petersen & Guidoti, Marcus & Barcellos, Aline', 4],
    ['Silva, Valeria Juliete Da & Santos, Cleverson Rannieri Meira Dos', 11]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    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);