function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Breteler, F. J.', 7],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 5],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 17],
    ['Hong-Wa, Cynthia', 89],
    ['Hong-Wa, Cynthia & Callmander, Martin W. & Baider, Cláudia', 4],
    ['Info Flora', 16],
    ['Jarvis, Charlie', 30],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 11],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 11],
    ['Lingelsheim, Alexander von', 8],
    ['Linnaeus, Carolus', 19],
    ['Quang, Bui Hong & Choudhary, Ritesh Kumar & Lee, Joongku', 9],
    ['Quang, Bui Hong & Nuraliev, Maxim S.', 16],
    ['Suh, Soo-Jung', 8],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 7],
    ['Other (49)', 73]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=330)',
    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);