function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 17],
    ['Chakrabarti, Samiran & Sur, Surajit & Roy, Sourav', 5],
    ['Denk, Thomas & Sami, Marco & Teodoridis, Vasilis', 4],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 13],
    ['Holstein, Norbert & Tamer, Sarah el & Weigend, Maximilian', 27],
    ['Holstein, Norbert & Weigend, Maximilian', 94],
    ['Howell, Nathan & Krings, Alexander & Braham, Richard R', 4],
    ['Info Flora', 19],
    ['Jarvis, Charlie', 13],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 11],
    ['Kovar-Eder, Johanna & Kvaček, Zlatko & Teodoridis, Vasilis', 5],
    ['Kvaček, Zlatko & Teodoridis, Vasilis & Radoň, Miroslav', 6],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 15],
    ['Smith, MacKenzie A. & Greenwalt, Dale E. & Manchester, Steven R.', 6],
    ['Suh, Soo-Jung', 8],
    ['Other (20)', 25]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=272)',
    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);