function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cantallo, Harold & Gomes, Nuno & Antunes, Carlos', 1],
    ['Davids, Kees & Sabatino, Antonio Di & Gerecke, Reinhard', 3],
    ['Erman, Orhan & Pešić, Vladimir & Esen, Yunus & Özkan, Muhlis', 6],
    ['Gerecke, Reinhard', 3],
    ['Hajizadeh, Jalil & Hosseini, Reza', 1],
    ['Latreille, Pierre André', 1],
    ['Li, Hai-Tao & Jin, Dao-Chao & Yi, Tian-Ci & Guo, Jian-Jun', 3],
    ['Pesic, Vladimir & Saboori, Alireza', 1],
    ['Pešić, Vladimir & Bańkowska, Aleksandra & Goldschmidt, Tom', 1],
    ['Pešić, Vladimir & Chatterjee, Tapas & Bordoloi, Sabitry', 3],
    ['Pešić, Vladimir & Smit, Harry & Saboori, Alireza', 2],
    ['Smit, H. & Gerecke, R.', 10],
    ['Smit, Harry', 1],
    ['Smit, Harry & Pešić, Vladimir', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=38)',
    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);