function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bertoloni, Giuseppe', 1],
    ['Bächli, Gerhard & Merz, Bernhard & Haenni, Jean-Paul', 1],
    ['Cole, Frank R.', 1],
    ['Ebejer, Martin J. & Gatt, Paul', 1],
    ['El-Hawagry, Magdi S. & Abdel-Dayem, Mahmoud S.', 1],
    ['Fabricius, Johann Christian', 1],
    ['Latreille, Pierre André', 2],
    ['Meigen, Johann Wilhelm', 12],
    ['Michelsen, Verner & O’Hara, James E.', 1],
    ['Schlüsslmayr, Gerhard', 4],
    ['Sforzi, Alessandra & Sommaggio, Daniele', 1],
    ['Waltl, Joseph', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=27)',
    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);