function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Allgén, C. A.', 5],
    ['Alvani, Somaye & Mahdikhani-Moghadam, Esmat & Rouhani, Hamid', 2],
    ['Azizi, Kourosh & Eskandari, Ali & Karegar, Akbar & Ghaderi, Reza', 1],
    ['Bohra, Padma', 2],
    ['Gerber, K.', 2],
    ['Ghaemi, Razieh & Pourjam, Ebrahim & Atighi, Mohammad Reza', 3],
    ['Holovachov, Oleksandr', 48],
    ['Mehrabian, Fatemeh & Azizi, Kourosh & Bazgir, Eadi', 2],
    ['P. A. A. LOOF', 7],
    ['Shahina, F. & Nasira, K. & Firoza, K. & Erum, Y. I.', 21],
    ['Soós, A.', 2],
    ['Stefanski, W.', 2],
    ['Von W. Schneider', 2],
    ['Wilhelm Schneider', 2],
    ['Árpád, Soós', 6],
    ['Other (16)', 16]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=123)',
    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);