function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Appolloni, Massimo & Smriglio, Carlo & Amati, Bruno', 1],
    ['Cunha, Carlo M. & Salvador, Rodrigo B.', 5],
    ['Deshayes, G. P. & Milne-Edwards, Henri', 1],
    ['Gofas, Serge & Luque, Ángel A. & Oliver, Joan Daniel', 3],
    ['Hansen, Thomas', 1],
    ['Helwerda, Renate A.', 12],
    ['Negri, Mauro Pietro & Corselli, Cesare', 1],
    ['Ortega, José Rafael & Gofas, Serge', 2],
    ['Thivaiou, Danae & Harzhauser, Mathias & Koskeridou, Efterpi', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    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);