function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Erman, Orhan & Pešić, Vladimir & Esen, Yunus & Özkan, Muhlis', 50],
    ['Ferradás, Rosso & Beatriz', 5],
    ['LIU, DONG & YI, TIAN-CI & XU, YUN & ZHANG, ZHI-QIANG', 33],
    ['Martin, Peter', 6],
    ['Orginal, Harry Smit', 10],
    ['Pešić, Vladimir & Bańkowska, Aleksandra & Goldschmidt, Tom', 6],
    ['Pešić, Vladimir & Chatterjee, Tapas & Bordoloi, Sabitry', 35],
    ['Pešić, Vladimir & Smit, Harry & Saboori, Alireza', 7],
    ['Smit, H.', 35],
    ['Smit, H. & Gerecke, R.', 58],
    ['Smit, Harry', 89],
    ['Smit, Harry & Pesic, Vladimir', 20],
    ['Tuzovskij, Petr V. & Semenchenko, Ksenia A.', 6],
    ['Zawal, Andrzej', 45],
    ['Zheng, Yulin & Guo, Jianjun & Zhang, Runzhi', 5],
    ['Other (23)', 47]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=457)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);