function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Brembach, M.', 2],
    ['Huylebrouck, Jan & Hadiaty, Renny Kurnia & Herder, Fabian', 3],
    ['Kraemer, Janina & Thieme, Philipp & Hadiaty, Renny Kurnia', 5],
    ['Meisner, Amy Downing', 1],
    ['Meisner, Amy Downing & Louie, Kristina D.', 1],
    ['Vogt, D.', 1],
    ['Weber, M. & de Beaufort, L. F.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);