function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ahadiyat, Ali & Moghadam, Sahebeh Ghasemi', 12],
    ['Alatawi, Fahad Jaber & Kamran, Muhammad & Mirza, Jawwad Hassan', 1],
    ['MAŠÁN, PETER & HALLIDAY, BRUCE', 81],
    ['Mojahed, Samaneh & Hajizadeh, Jalil & Hosseini, Reza', 6],
    ['Nemati, Alireza & Riahi, Elham & Khalili-Moghadam, Arsalan', 2],
    ['Zhang, Xue-Song & Guo, Jian-Jun & Yi, Tian-Ci & Jin, Dao-Chao', 3],
    ['Özbek, Hasan Hüseyin', 4],
    ['Şahin, Gülhan & Özbek, Hasan Hüseyin', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=111)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);