function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Brösing, Andreas', 1],
    ['Castro, Peter', 2],
    ['Castro, Peter & Naruse, Tohru', 2],
    ['Castro, Peter & Williams, Austin B. & Cooper, Lara L.', 10],
    ['Evenhuis, Neal L. & O’Hara, James E. & Pape, Thomas', 1],
    ['González, José A.', 1],
    ['Guinot, Danièle & Quenette, Gwenaël', 2],
    ['Muñoz, Isabel & García-Isarch, Eva & Cuesta, Jose A.', 2],
    ['Poupin, Joseph & Corbari, Laure & Pérez, Thierry', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    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);