function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acosta, Luis E. & Fet, Victor', 1],
    ['Al-Saraireh, MOhammad & Yağmur, Ersen Aydın & Afifeh, Bassam Abu', 1],
    ['Fabricius, Johann Christian', 1],
    ['Gervais, F. L. Paul', 1],
    ['Linnaeus, Carolus', 6],
    ['Lourenço, Wilson R. & Cloudsley-Thompson, John L.', 1],
    ['Monod, Lionel & Duperre, Nadine & Harms, Danilo', 7],
    ['Navidpour, Shahrokh & Fet, Victor & Kovařík, František', 1],
    ['Navidpour, Shahrokh & Kovařík, František & Soleglad, Michael E.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    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);