function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Brady, H. B.', 30],
    ['Conrad, Timothy Abbot', 1],
    ['Ismail, Ahmed A.', 3],
    ['Korshunova, Tatiana & Malmberg, Klas & Prkic, Jakov', 6],
    ['Mamo, Briony L.', 1],
    ['Margerel, Jean-Pierre', 84],
    ['Röding, Peter Friedrich', 1],
    ['Symphonia, Tabita K. & Senthil, Nathan D.', 10],
    ['Toefy, R. & Gibbons, M. J. & McMillan, I. K.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=138)',
    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);