function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ahadiyat, Ali & Moghadam, Sahebeh Ghasemi', 2],
    ['Babaeian, Esmaeil & Mašán, Peter & Saboori, Alireza', 3],
    ['LIU, DONG & YI, TIAN-CI & XU, YUN & ZHANG, ZHI-QIANG', 3],
    ['MAŠÁN, PETER & HALLIDAY, BRUCE', 21],
    ['Marchenko, Irina I.', 3],
    ['Masan, Peter', 2],
    ['Mašán, Peter & Mihál, Ivan', 4],
    ['Murvanidze, Maka & Mumladze, Levan & Todria, Nino', 1],
    ['Nemati, Alireza & Riahi, Elham & Khalili-Moghadam, Arsalan', 1],
    ['Saboori, Alireza & Shirvani, Zeinab', 2],
    ['Özbek, Hasan Hüseyin & Halliday, Bruce', 8],
    ['Şahin, Gülhan & Özbek, Hasan Hüseyin', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=51)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);