function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Grabovskaya-Borodina, Alisa E. & Illarionova, Irina D.', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 13],
    ['Info Flora', 13],
    ['Jarvis, Charlie', 10],
    ['Kim, Kyeonghee & Suh, Hwa-Jung & Song, Jun-Ho', 2],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 10],
    ['Le Brun, P.', 1],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 1],
    ['Linnaeus, Carolus', 4],
    ['Martinez-Fort, Javier & Leon, Maela & Donat-Torres, Maria P.', 1],
    ['Reich, Dieter & Gutermann, Walter & Bardy, Katharina', 1],
    ['Sui, Ziwei & Luo, Jun & Yao, Ruolan & Huang, Chuanlong', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=58)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);