function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Dijkstra, Henk H.', 2],
    ['Dijkstra, Henk H. & Matsukuma, Akihiko', 1],
    ['Faisal, Mohammad & Singh, Sudhir', 2],
    ['Fuersich, Franz T. & Alberti, Matthias & Pandey, Dhirendra K.', 2],
    ['Ivanova, Mariya B. & Tsurpalo, Alexandra P.', 2],
    ['Lutaenko, K. A. & Artemieva, N. G.', 2],
    ['Oliver, P. Graham & Holmes, Anna & Killeen, Ian & Light, Janice', 1],
    ['Röding, Peter Friedrich', 1],
    ['Serb, Jeanne M. & Alejandrino, Alvin & Otárola-Castillo, Erik', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);