function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alekseev, Vitalii I. & Drotikova, Anna M. & Rozhina, Viktoria I.', 1],
    ['Cebeci, Hüseyin & Özdikmen, Hüseyin & Turgut, Semra', 2],
    ['Chittaro, Yannick & Sanchez, Andreas & Blanc, Mickaël', 1],
    ['Danilevsky, Mikhail L. & Skrylnik, Y. E.', 1],
    ['Ilić, Nastas & Ćurčić, Srećko', 1],
    ['Kadyrov, Abdysalom Kh. & Karpinski, Lech', 1],
    ['Karpiński, Lech & Szczepański, Wojciech T. & Kruszelnicki, Lech', 9],
    ['López, Marcos A. & Baena, Manuel', 2],
    ['Mitter, Heinz', 1],
    ['Mitter, Heinz & A, Upper', 1],
    ['Sanchez, Andreas & Chittaro, Yannick & Monnerat, Christian', 1],
    ['Schedl, W.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    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);