function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Baker, Horace Burrington', 1],
    ['Dedov, Ivailo & Subai, Peter', 4],
    ['Dedov, Ivaylo', 1],
    ['Deli, Tamás & Subai, Péter', 13],
    ['Frank, Christa', 4],
    ['Georgiev, Dilian & Dedov, Ivailo', 1],
    ['Guemues, Burcin Askim & Neubert, Eike', 1],
    ['Harzhauser, Mathias & Neubauer, Thomas A.', 1],
    ['Maroulis, Leonidas & Vardinoyannis, Katerina & Karakasi, Danae', 3],
    ['Neubert, Eike & Bössneck, Ulrich', 1],
    ['Slapcinsky, John & Coles, Brian F.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=32)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);