function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abotsi, Komla Elikplim & Kokou, Kouami & Dubuisson, Jean-Yves', 14],
    ['Carmes, Amanda Angélica & Dechoum, Michele de Sá', 10],
    ['Christenhusz, Maarten J. M. & Zhang, Xian-Chun', 37],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 20],
    ['Holttum, Richard Erick', 26],
    ['Info Flora', 21],
    ['Jarvis, Charlie', 17],
    ['Kessler, Michael & Smith, Alan R. & Øllgaard, Benjamin', 8],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 13],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 20],
    ['Rakotondrainibe, France & Tronchet, Frédéric', 9],
    ['Rosenstock, Eduard', 16],
    ['Roux, Jacobus P.', 22],
    ['Zhang, Li-Bing', 52],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 22],
    ['Other (52)', 115]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=422)',
    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);