function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Borojevic, Radovan & Boury-Esnault, Nicole & Vacelet, Jean', 3],
    ['Borojevic, Radovan & Klautau, Michelle', 2],
    ['Chagas, Cléslei & Cavalcanti, Fernanda F.', 2],
    ['Klautau, Michelle & Imešek, Mirna & Azevedo, Fernanda', 1],
    ['Rützler, Klaus & Piantoni, Carla & Van, Rob W. M.', 1],
    ['Van, Rob W. M. & De, Nicole J.', 11]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);