function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Erman, Orhan & Gülle, Pinar & Özkan, Muhlis & Candoğan, Hülya', 1],
    ['Erman, Orhan & Pešić, Vladimir & Esen, Yunus & Özkan, Muhlis', 6],
    ['Esen, Yunus', 2],
    ['Goldschmidt, Tom', 15],
    ['LIU, DONG & YI, TIAN-CI & XU, YUN & ZHANG, ZHI-QIANG', 12],
    ['Ma, Min & Li, Sheng-Cai & Fan, Qing-Hai', 1],
    ['Pesic, Vladimir & Saboori, Alireza', 1],
    ['Pešić, Vladimir', 2],
    ['Pešić, Vladimir & Chatterjee, Tapas & Bordoloi, Sabitry', 7],
    ['Pešić, Vladimir & Smit, Harry & Saboori, Alireza', 4],
    ['Smit, H. & Gerecke, R.', 1],
    ['Smit, H. & Pesic, V.', 3],
    ['Smit, Harry', 1],
    ['Yi, Tianci & Jin, Daochao & Guo, Jianjun', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=57)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);