function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Akyazı, Rana & Welbourn, Cal & Liburd, Oscar E.', 2],
    ['Banks, Nathan', 2],
    ['Canestrini, Giovanni & Fanzago, F.', 1],
    ['Cilbircioğlu, Cihan & Çobanoğlu, Sultan', 1],
    ['Demite, Peterson R. & Cavalcante, Ana C. C. & Lofego, Antonio C.', 3],
    ['Ebrahimi, Najmeh & Noei, Javad', 2],
    ['Erdoğan, Tuğba & Çobanoğlu, Sultan', 1],
    ['Ewing, Henry Ellsworth', 1],
    ['Gheblealivand, Saeide S. & Irani-Nejad, Karim Haddad', 27],
    ['Khaustov, Alexander', 1],
    ['Khaustov, Alexander A.', 2],
    ['Lofego, A. C. & Ochoa, R. & Moraes, G. J.', 4],
    ['Magowski, Wojciech L. & Khaustov, Alexandr A.', 2],
    ['Magowski, Wojciech Ł.', 2],
    ['Willmann, C.', 2],
    ['Other (5)', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=58)',
    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);