function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Balzan, L.', 35],
    ['Banks, Nathan', 6],
    ['Beier, Max', 5],
    ['Chamberlin, Joseph Conrad', 4],
    ['Di Caporiacco, L.', 3],
    ['Ellingsen, Edvard', 34],
    ['Hermann, J. F.', 5],
    ['Hewitt, John & Godfrey, Robert', 3],
    ['Koch, Ludwig Carl Christian', 10],
    ['Redikorzev, V.', 9],
    ['Simon, Eugène', 16],
    ['Thorell, Tord Tamerlan Teodor', 10],
    ['Tullgren, Albert', 21],
    ['Tömösváry, Ö.', 5],
    ['With, Carl Johannes', 35],
    ['Other (34)', 48]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=249)',
    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);