function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 20],
    ['Dalastra, Claudenice Hilda & Heiden, Gustavo', 17],
    ['Fritsch, Peter W. & Armstrong, Kate E. & Aung, Mu Mu', 48],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 36],
    ['Howell, Nathan & Krings, Alexander & Braham, Richard R', 16],
    ['Info Flora', 37],
    ['Jarvis, Charlie', 128],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 32],
    ['Koorders, Sijfert Hendrik', 15],
    ['Linnaeus, Carolus', 72],
    ['Nelson, E. Charles & Oliver, E. G. H. & Pirie, Michael D.', 18],
    ['Sleumer, Hermann Otto', 174],
    ['Smith, Johannes Jacobus', 23],
    ['Thornhill, Robert & Krings, Alexander & Lindbo, David', 36],
    ['White, Kristine N.', 102],
    ['Other (90)', 251]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=1025)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);