function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Dursun, Ahmet & Fent, Meral', 3],
    ['Ghahari, Hassan & Moulet, Pierre & Rider, David A.', 2],
    ['Külekçi, G. & Yildirim, E. & Tezcan, S.', 1],
    ['Laterza, Ilaria & Tamburini, Giovanni & Panzarino, Onofrio', 1],
    ['Norbiato, Margherita & Dioli, Paride & Cianferoni, Fabio', 1],
    ['Rider, David A. & Swanson, Daniel R.', 2],
    ['Roell, Talita & Lemaître, Valérie A. & Webb, Michael D.', 4],
    ['Sakenin, H. & Samin, N. & Rastegari, J. & Havaskary, M.', 1],
    ['Souma, Jun & Utagawa, Akihiro & Ishikawa, Tadashi', 4],
    ['Vinokurov, Nikolay N. & Rudoi, Valentin V.', 1],
    ['Zhao, Qing & Liu, Guoqing & Bu, Wenjun', 8]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    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);