function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Batista-Silva, Valéria Flávia & Frota, Augusto', 1],
    ['Diniz, Paulo Baltazar & Siqueira, Hatus de Oliveira', 1],
    ['Jerep, Fernando C. & Malabarba, Luiz R.', 1],
    ['Koerber, Stefan & Litz, Thomas O. & Serra, Wilson S.', 1],
    ['Litz, Thomas O. & The, Stefan Koerber Introduction', 1],
    ['Malabarba, Luiz R. & Jerep, Fernando C.', 4],
    ['Ota, Renata Rúbia & Deprá, Gabriel de Carvalho', 5],
    ['Reia, Lais & S. da Costa e Silva, Gabriel', 1],
    ['Serra, Wilson S. & Scarabino, Fabrizio & Paullier, Sofía', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);