function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 34],
    ['George Bentham & Ferdinand Mueller', 16],
    ['Hassan, Walaa A. & Al-Shaye, Najla A. & Alghamdi, Salma', 20],
    ['Hassan, Walaa A. & Al-Shaye, Najla A. & Iamonico, Duilio', 43],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 38],
    ['Info Flora', 57],
    ['Jarvis, Charlie', 148],
    ['Jonsell, B., Karlsson', 66],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 47],
    ['Linnaeus, Carolus', 70],
    ['Mucina, Ladislav', 99],
    ['Nathaniel John Winch', 13],
    ['Ramella, Lorenzo', 43],
    ['Thomas Borsch & Hilda Flores-Olvera & Silvia Zumaya & Kai Müller', 36],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 16],
    ['Other (83)', 208]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=954)',
    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);