function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barbar, Ziad', 1],
    ['Barbar, Ziad & Parker, Bruce & Auger, Philippe', 2],
    ['Erdoğan, Tuğba & Çobanoğlu, Sultan', 1],
    ['Giosa, Marcello De & Tassi, Aline Daniele & McDonald, Eric M.', 2],
    ['Khanjani, Masoumeh & Khanjani, Mohammad & Saboori, Alireza', 11],
    ['LIU, DONG & YI, TIAN-CI & XU, YUN & ZHANG, ZHI-QIANG', 4],
    ['Mitra, Subhasree & Acharya, Shelley & Ghosh, Sujay', 1],
    ['Raissi Ardali, M. & Hadizadeh, A. & Mohammadi Sharif, M.', 1],
    ['Ueckermann, Edward A. & Palevsky, Eric & Gerson, Uri', 7],
    ['Ueckermann, Edward A. & Ripka, Géza', 5],
    ['Çobanoğlu, Sultan & Ueckermann, Edward Albert', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=38)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);