function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Agassiz, A.', 2],
    ['Amon, Diva J & Ziegler, Amanda F & Kremenetskaia, Antonina', 2],
    ['Despalatović, Marija & Cvitković, Ivan & Žuljević, Ante', 1],
    ['Filander, Zoleka & Griffiths, Charles', 2],
    ['Gondim, Anne Isabelley & Moura, Rafael Bendayan De', 3],
    ['Kašćelan, Slavica & Mandić, Sreten & Radović, Ivica', 1],
    ['Kroh, Andreas', 1],
    ['Madeira, Patrícia & Kroh, Andreas & Cordeiro, Ricardo', 1],
    ['Zachos, Louis G.', 1],
    ['Zachos, Louis G. & Molineux, Ann', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);