function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Khazali, Azhar Mohammed & Kachel, Hamid Saeid', 2],
    ['Brescovit, Antonio Domingos & Ferreira, Rodrigo Lopes', 2],
    ['Chatzaki, Maria & Keer, Johan Van', 1],
    ['Dean, David Allen', 1],
    ['Haddad, Charles R. & Marusik, Yuri M.', 1],
    ['Perez-Gelabert, Daniel E.', 1],
    ['Reboleira, Ana Sofia P. S. & Pérez, Antonio José', 2],
    ['Rodrigues, Bruno V. B. & Rheims, Cristina A.', 22],
    ['Saaristo, Michael I.', 1],
    ['Saturnino, Regiane & Tourinho, Ana Lúcia', 1],
    ['Zamani, Alireza & Chatzaki, Maria & Esyunin, Sergei L.', 1],
    ['Zonstein, Sergei & Marusik, Yuri & Omelko, Mikhail', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=37)',
    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);