function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Campos, Luiz Alexandre & Roell, Talita', 2],
    ['Carrenho, Renan & Rodrigues, Higor D. D.', 2],
    ['Castro-Huertas, Valentina & Grazia, Jocelia & Forero, Dimitri', 7],
    ['Maciel, Aline S. & Garbelotto, Thereza de A. & Winter, Ingrid C.', 2],
    ['Silva, Valeria Juliete Da & Santos, Cleverson Rannieri Meira Dos', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);