function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Dózsa-Farkas, Klára & Csitári, Bianka & Felföldi, Tamás', 6],
    ['Felföldi, Tamás & Dózsa-Farkas, Klára & Nagy, Hajnalka', 2],
    ['Martin, Patrick & Schmelz, Rüdiger M. & Dole-Olivier, Marie-José', 1],
    ['Schmelz, Rüdiger M. & Jocque, Merlijn & Collado, Rut', 2],
    ['Šundić, Danijela & Radujković, Branko M.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);