function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Akçiçek, Ekrem & Güner, Özal', 1],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 4],
    ['Ferrer-Gallego, P. Pablo & Güner, Özal', 1],
    ['Firat, Mehmet', 1],
    ['Firat, Mehmet & Güner, Özal', 2],
    ['Güner, Özal', 1],
    ['Güner, Özal & Akçiçek, Ekrem & Dirmenci, Tuncay', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 11],
    ['Info Flora', 17],
    ['Jarvis, Charlie', 27],
    ['Jeanmonod, Daniel', 1],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 14],
    ['Reich, Dieter & Gutermann, Walter & Bardy, Katharina', 12],
    ['Shuka, Lulezim & Tan, Kit', 2],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 3],
    ['Other (4)', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=102)',
    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);