function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Asenjo, Angélico & e, Sistemática & de, Bioecologia & Coleoptera', 2],
    ['Assing, V.', 2],
    ['Assing, Volker', 1],
    ['Assing, Volker & Schülke, Michael', 4],
    ['Assing, Volker & Schülke, Michael & Brachat, Volker', 1],
    ['Chatzimanolis, Stylianos & Engel, Michael S.', 2],
    ['Maus, Mariana Chani-Posse De', 1],
    ['Navarrete-Heredia, José Luis & Gómez-Rodríguez, Cecilia', 1],
    ['Schülke, Michael & Renner, Klaus & D, South', 1],
    ['Stephens, James Francis', 1],
    ['Webster, Reginald P. & Smetana, Ales & Sweeney, Jon D.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);