function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bernard, F.', 13],
    ['Borowiec, Marek L.', 1],
    ['Christoph Germann', 1],
    ['Emery, C.', 4],
    ['Forel, A.', 25],
    ['Jimoh, Bunmi Omowumi & Gomez, Kiko & Kemabonta, Kehinde Abike', 17],
    ['Mayr, G.', 2],
    ['Paknia, O. & Radchenko, A. & Alipanah, H.', 2],
    ['Radchenko, Alexander G. & Fisher, Brian L. & Esteves, Flavia A.', 3],
    ['Santschi, F.', 61],
    ['Schöning, C. & Gotwald, W. H. & Kronauer, D. J. C.', 2],
    ['Schöning, Caspar & Gotwald, William H. & Kronauer, Daniel J. C.', 2],
    ['Wheeler, W. M.', 21]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=154)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);