function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Doğan, Sibel & Doğan, Salih', 8],
    ['Doğan, Sibel & Doğan, Salih & Erman, Orhan', 7],
    ['Doġan, Salih', 41],
    ['Dönel, Güldem & Doğan, Salih', 36],
    ['Fan, Qing-Hai & Zhang, Zhi-Qiang', 29],
    ['Hatami, Parisa & Jafari, Shahriar & Ahmad-Hosseini, Mohammad', 6],
    ['Johann, Liana & Carvalho, Gervásio Silva & Majolo, Fernanda', 10],
    ['Khaustov, A. A.', 15],
    ['Khaustov, Alexander A.', 16],
    ['Khaustov, Alexander A. & Tolstikov, Andrei V.', 7],
    ['LIU, DONG & YI, TIAN-CI & XU, YUN & ZHANG, ZHI-QIANG', 20],
    ['Maleki, Naser & Bagheri, Mohammad & Gharekhani, gholamhossein', 9],
    ['Mohammad-Doustaresharaf, Mojtaba & Bagheri, Mohammad', 20],
    ['Sali & Doğan, H', 12],
    ['Willmann, C.', 12],
    ['Other (60)', 140]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=388)',
    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);