function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ballal, Chandish R. & Akbar, Shahid Ali & Yamada, Kazutaka', 4],
    ['Borges, Paulo A. V. & Gaspar, Clara', 2],
    ['Ghahari, Hassan & Carpintero, Diego Leonardo & Ostovan, Hadi', 2],
    ['Heiss, Ernst & Eckelt, Andreas & Lederwasch, Manfred', 2],
    ['Hiura, Isamu', 1],
    ['Moulet, Pierre', 2],
    ['Yamada, Kazutaka & Hirowatari, Toshiya', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    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);