function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 21],
    ['Gillespie, Lynn J. & Saarela, Jeffery M. & Sokoloff, Paul C.', 1],
    ['Grabovskaya-Borodina, Alisa E. & Illarionova, Irina D.', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 18],
    ['Info Flora', 25],
    ['Jarvis, Charlie', 11],
    ['Jiang, Xiao-Qi & Zhang, Na & Wu, Zhi-Kun', 1],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 13],
    ['Kovtonyuk, Nataliya', 16],
    ['Kovtonyuk, Nataliya & Durand-Andro, Véronique', 10],
    ['Le Brun, P.', 2],
    ['Linnaeus, Carolus', 10],
    ['Reich, Dieter & Gutermann, Walter & Bardy, Katharina', 2],
    ['Stöhr, O. & Pilsl, P. & Essl, F. & Hohla, M. & Schröck, C.', 3],
    ['Wang, Shi-Qin & Yan, Hai-Fei & Cheng, Zhi-Jie & Wang, Yu-Bing', 2],
    ['Other (16)', 16]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=152)',
    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);