function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chang, Cheon Young & Lee, Jimin', 2],
    ['Gómez, S. & Rocha, C. E. F.', 1],
    ['Menu-Marque, Silvina & Sorarrain, Dora', 1],
    ['Rocha, Carlos E. F. & Iliffe, Thomas M. & Reid, Janet W.', 1],
    ['Suarez-Morales, Eduardo & Fuentes-Reines, Juan M.', 1],
    ['Totakura, Venkateswara Rao & Reddy, Yenumula Ranga', 2],
    ['Ueda, Hiroshi & Nagai, Hidefumi', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);