function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 21],
    ['Chen, Tao & Wang, Ting-Ting & Liu, Shao-Yun & Wang, Huan-Chong', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 34],
    ['Hul, Sovanmoly', 2],
    ['Info Flora', 41],
    ['Jarvis, Charlie', 15],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 34],
    ['Lahiri, Subhajit & Dash, Sudhansu Sekhar & Maity, Rohan', 2],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 4],
    ['Linnaeus, Carolus', 23],
    ['Ponticelli, Maria & Lela, Ludovica & Moles, Mariapia', 8],
    ['Ridley, Henry Nicholas', 2],
    ['Royen, Pieter van', 13],
    ['Smith, H.', 2],
    ['Thornhill, Robert & Krings, Alexander & Lindbo, David', 6],
    ['Other (5)', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=213)',
    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);