function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['El-Hawagry, Magdi S.', 6],
    ['El-Hawagry, Magdi S. & Abdel-Dayem, Mahmoud S.', 2],
    ['Fazel, M. & Fallahzadeh, M. & Gheibi, M.', 2],
    ['Harym, Younes El & Belqat, Boutaina', 3],
    ['Khan, Qaiser & Kakar, Asmathullah & Kamran, Kashif', 1],
    ['Korneyev, S. V.', 1],
    ['Kovac, D. & Kameneva, E. P. & Korneyev, V. A.', 2],
    ['Malloch, John Russell', 11],
    ['Merz, B. & Kofler, A.', 1],
    ['Namin, Saeed Mohamadzade & Korneyev, Valery A.', 4],
    ['Norrbom, Allen L. & Neder, Lilia Estela', 5],
    ['Norrbom, Allen L. & Sutton, Bruce D. & Steck, Gary J.', 1],
    ['Penado, Andreia & Smit, John & Aguiar, António Franquinho', 2],
    ['Sforzi, Alessandra & Sommaggio, Daniele', 2],
    ['Soltanizadeh, Zohreh & Saghaei, Nazila & Ostovan, Hadi', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=45)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);