function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anonymous', 4],
    ['Becherer', 14],
    ['Brenan, J. P. M', 12],
    ['Charles Joseph Pitard and Louis Proust', 6],
    ['D. Rapin', 4],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 14],
    ['Info Flora', 22],
    ['Jarvis, Charlie', 19],
    ['John Lindley', 5],
    ['Jonsell, B., Karlsson', 62],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 20],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 4],
    ['Linnaeus, Carolus', 23],
    ['Nathaniel John Winch', 13],
    ['Sukhorukov, Alexander P. & Liu, Pei-Liang & Kushunina, Maria', 13],
    ['Other (22)', 29]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=264)',
    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);