function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ellis, John & Solander, Daniel Carl', 2],
    ['Linnaeus, Carolus', 4],
    ['Mcfadden, Catherine S. & Van Ofwegen, Leen P.', 2],
    ['Müller, Otto Friedrich', 1],
    ['Ofwegen, Van', 7],
    ['Olivi, Giuseppe', 2],
    ['Pérez, Carlos Daniel & Zamponi, Mauricio Oscar', 2],
    ['Schejter, L. & Genzano, G. & Pérez, C. D. & Acuña, F.', 8],
    ['Van Soest, Rob W. M. & Plotkin, Alexander', 1],
    ['Williams, Gary C.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=30)',
    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);