function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Franzese, Sebastián & Mutti, Leonardo D. & Tropea, Carolina', 2],
    ['Hu, Yuzhong & Guo, Yu & Lai, Qiliang & Dong, Le & Huang, Zhaobin', 1],
    ['Scholz, T. & Aguirre-Macedo, M. L. & Salgado-Maldonado, G.', 1],
    ['Sokolov, Sergey & Frolov, Evgeniy & Novokreshchennykh, Semen', 3],
    ['da Graça, Rodrigo J. & Oda, Fabrício H. & Lima, Flávia S.', 21]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    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);