function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bossert, Silas & Noort, Simon van', 3],
    ['Davies, G. B. P. & Eardley, C. D. & Brothers, D. J.', 11],
    ['Davies, Gregory B. P. & Brothers, Denis J.', 5],
    ['Davies, Gregory B. P. & Eardley, Connal D. & Brothers, Denis J.', 2],
    ['Kuhlmann, Michael', 22],
    ['Kuhlmann, Michael & Friehs, Thyra', 21],
    ['Mack, Anne & Kuhlmann, Michael', 36]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=100)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);