function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Garlitska, Lesya & George, Kai Horst & Chertoprud, Elena S.', 2],
    ['George, Kai Horst', 12],
    ['George, Kai Horst & Glatzel, Thomas & Schröder, Katharina', 3],
    ['George, Kai Horst & Lehmanski, Linda Maria Anne', 2],
    ['George, Kai Horst & Plum, Christoph', 3],
    ['Gheerardyn, Hendrik & George, Kai Horst', 10],
    ['Gomez, Samuel & Diaz, Karen', 2],
    ['Wandeness, Adriane P. & George, Kai H. & Santos, Paulo J. P.', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=38)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);