function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Erman, Orhan & Pešić, Vladimir & Esen, Yunus & Özkan, Muhlis', 14],
    ['Esen, Yunus & Pešić, Vladimir & Erman, Orhan', 16],
    ['K, Harry Smit & K, Vladimir Pešić & K, Mer Man Gurung', 6],
    ['Koenike, F.', 4],
    ['LIU, DONG & YI, TIAN-CI & XU, YUN & ZHANG, ZHI-QIANG', 12],
    ['Martin, Peter', 10],
    ['Pesic, Vladimir & Panesar, Arne', 3],
    ['Pesic, Vladimir & Smit, Harry', 3],
    ['Pešić, Vladimir & Bańkowska, Aleksandra & Goldschmidt, Tom', 5],
    ['Pešić, Vladimir & Chatterjee, Tapas & Bordoloi, Sabitry', 4],
    ['Pešić, Vladimir & Smit, Harry & Saboori, Alireza', 6],
    ['Sabatino, Antonio Di & Gerecke, Reinhard & Gledhill, Terence', 7],
    ['Smit, H. & Gerecke, R.', 17],
    ['Tuzovskij, Petr V.', 4],
    ['Zhang, Xu & Jin, Dao-Chao', 8],
    ['Other (17)', 25]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=144)',
    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);