function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bächli, Gerhard & Merz, Bernhard & Haenni, Jean-Paul', 2],
    ['Ebejer, Martin J. & Gatt, Paul', 1],
    ['MacGowan, I. & Vikhrev, N. E. & Krivosheina, M. G.', 4],
    ['Meigen, Johann Wilhelm', 1],
    ['Ozerov, A. L. & Krivosheina, M. G.', 1],
    ['Telfer, Angela C & Young, Monica R & Quinn, Jenna & Perez, Kate', 1],
    ['V, Marco', 21],
    ['Šifner, František', 55],
    ['Šifner, František & R, Czech', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=95)',
    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);