function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Fabricius, Johann Christian', 1],
    ['Heimburg, Helge & Doczkal, Dieter & Holzinger, Werner E.', 1],
    ['Kočić, Anja & Vujić, Ante & Tot, Tamara', 1],
    ['MAZáNEK, Libor & VONIČKA, Pavel & PREISLER, JiřÍ', 1],
    ['Meigen, Johann Wilhelm', 7],
    ['Mengual, Ximo & Miranda, Gil Felipe G. & Thompson, F. Christian', 2],
    ['Montoya, Augusto L.', 10],
    ['Ricarte, Antonio & Rotheray, Graham E. & Lyszkowski, Richard M.', 1],
    ['Thompson, F. Christian & Skevington, Jeffrey H.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=25)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);