function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chatti, A. & Kreiter, S. & Lebdi-Grissa, K. & Ksantini, M.', 1],
    ['De, Gilberto J. & Zannou, Ignace D. & Ueckermann, Eddie A.', 3],
    ['Erdoğan, Tuğba & Çobanoğlu, Sultan', 1],
    ['Faraji, Farid & Hoekstra, Paul H.', 2],
    ['K, Ismail Döker & VangansbekeK, Dominiek & K, Jonas Merckx', 1],
    ['Kolodochka, L. A.', 3],
    ['Kreiter, Serge & Amiri, Karima & Douin, Martial & Bohinc, Tanja', 3],
    ['Nesbitt, H. H. J.', 1],
    ['Saglam, Damla & Doker, Ismail & Ozman-Sullivan, Sebahat K.', 1],
    ['Tixier, Marie-Stephane & Allam, Latifa & Douin, Martial', 2],
    ['Tixier, Marie-Stéphane & Baldassar, Andrea & Duso, Carlo', 1],
    ['Çakir, Şeyma & Tixier, Marie-Stephane', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    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);