function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Amary, Antonio', 1],
    ['Banks, Nathan', 3],
    ['Beier, Max', 12],
    ['Bristowe, William Syer', 1],
    ['Canestrini, G.', 1],
    ['Daday, E. von', 5],
    ['Di Caporiacco, L.', 1],
    ['Ellingsen, Edvard', 4],
    ['Hadži, Jovan', 1],
    ['Koch, Ludwig Carl Christian', 8],
    ['Müller, Giuseppe', 3],
    ['Navás, Longinos', 4],
    ['Nonidez, José F.', 7],
    ['Redikorzev, V.', 4],
    ['Simon, Eugène', 12],
    ['Other (14)', 14]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=81)',
    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);