function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ameziane, Nadia & Roux, Michel', 6],
    ['Amon, Diva J & Ziegler, Amanda F & Kremenetskaia, Antonina', 2],
    ['Eléaume, Marc & Bohn, Jens-Michael & Roux, Michel', 6],
    ['Gerdes, Klaas & Kihara, Terue Cristina & Martinez Arbizu, Pedro', 2],
    ['Madeira, Patrícia & Kroh, Andreas & Cordeiro, Ricardo', 1],
    ['Roux, Michel', 10],
    ['Roux, Michel & Bohn, Jens Michael', 2],
    ['Roux, Michel & Lambert, Philip', 7],
    ['Thomson, Charles Wyville', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=38)',
    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);