function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Embacher, G. & Malicky, H. & A. E & R. A', 2],
    ['Holzenthal, Ralph W. & Blahnik, Roger J.', 7],
    ['Ibrahimi, Halil & Kučinić, Mladen & Vitecek, Simon', 1],
    ['Johanson, Kjell Arne & Oláh, János', 4],
    ['Karaouzas, Ioannis & Waringer, Johann', 3],
    ['Malicky, H.', 1],
    ['Malicky, Hans', 1],
    ['Neto, Pedro Bonfá & Vilarino, Albane & Salles, Frederico F.', 1],
    ['Paprocki, Henrique & Franca, Diogo', 10],
    ['Ruiz-García, Antonio & Ferreras-Romero, Manuel', 1],
    ['Sipahiler, Füsun', 11],
    ['Waringer, Johann & Malicky, Hans', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=44)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);