function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Agassiz, A.', 1],
    ['Agassiz, A. & Clark, H. L.', 1],
    ['Coppard, Simon E. & Schultz, Heinke A. G.', 2],
    ['Courville, Erwan & Mooi, Rich & Poulin, Elie & Saucede, Thomas', 1],
    ['Courville, Erwan & Poulin, Elie & Saucede, Thomas & Mooi, Rich', 2],
    ['Despalatović, Marija & Cvitković, Ivan & Žuljević, Ante', 1],
    ['Fassbender, Nico & Stefanoudis, Paris V', 2],
    ['Filander, Zoleka & Griffiths, Charles', 3],
    ['Kašćelan, Slavica & Mandić, Sreten & Radović, Ivica', 1],
    ['Madeira, Patrícia & Kroh, Andreas & Cordeiro, Ricardo', 2],
    ['Mead, A. & Carlton, J. T. & Griffiths, C. L. & Rius, M.', 1],
    ['Tasso, Vicente & El Haddad, Mustapha & Assadi, Carolina', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    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);