function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bächli, Gerhard & Merz, Bernhard & Haenni, Jean-Paul', 6],
    ['El-Hawagry, Magdi S.', 2],
    ['Fernandes, Juliana Morgado & Couri, Márcia Souto', 8],
    ['Harym, Younes El & Korneyev, Valery', 1],
    ['Iain Macgowan & Gerhard Bächli', 3],
    ['Introduction, Iain & Fallén, Lonchaea', 7],
    ['MacGowan, I. & Barták, M.', 4],
    ['MacGowan, I. & Vikhrev, N. E. & Krivosheina, M. G.', 6],
    ['Macgowan, Iain', 25],
    ['Rodrigues, João Paulo Vinicios & González, Christian R.', 4],
    ['Rotheray, Graham & Lyszkowski, Richard', 2],
    ['Sinclair, Bradley J.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=69)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);