function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abramov, Aleksej & Hoffmann, Thomas & Stark, Timo D.', 2],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 1],
    ['Costa, Laura S. M. & Allan & Pires, S. & Damaceno, Neila B.', 1],
    ['Germain, Alexandre de Saint & Retailleau, Pascal', 1],
    ['Guo, Shaobin & Wang, Mingdi & Xu, Wen & Zou, Fuxian', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 2],
    ['Info Flora', 1],
    ['Jarvis, Charlie', 4],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 1],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 1],
    ['Moniodis, Jessie & Jones, Christopher G. & Barbour, E. Liz', 1],
    ['Novikov, Andriy', 1],
    ['Roepke, Jonathon & Bozzo, Gale G.', 1],
    ['Strehmel, Nadine & Böttcher, Christoph & Schmidt, Stephan', 1],
    ['Vylíčilová, Hana & Husičková, Alexandra & Spíchal, Lukáš', 1],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    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);