function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 4],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 6],
    ['Callmander, Martin W. & Durbin, Olivier D. & Lack, Hans-Walter', 2],
    ['Chen, Haimin & Chen, Jialing & Qi, Yao & Chu, Siyuan & Ma, Yao', 2],
    ['Fragoso-Martínez, Itzi & Martínez-Gordillo, Martha', 4],
    ['González-Gallegos, Jesús Guadalupe', 6],
    ['González-Gallegos, Jesús Guadalupe & Castro-Castro, Arturo', 6],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 9],
    ['Info Flora', 9],
    ['Jarvis, Charlie', 43],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 7],
    ['Linnaeus, Carolus', 27],
    ['Pendry, Colin A & Wei, Yukun K', 5],
    ['Turdiboev, Obidjon A. & Shormanova, Aijamal A.', 5],
    ['Zhang, Haihua & Xu, Jinfeng & Chen, Haimin & Jin, Weibo', 3],
    ['Other (19)', 27]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=165)',
    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);