function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['El-Hawagry, Magdi S.', 6],
    ['Evstigneev, D. A. & Przhiboro, A. A.', 4],
    ['Harym, Younes El & Belqat, Boutaina', 13],
    ['Khaghaninia, Samad & Zarghani, Ebrahim', 3],
    ['Korneyev, S. V.', 3],
    ['Korneyev, S. V. & Klasa, A.', 9],
    ['Korneyev, Severyn V.', 10],
    ['Korneyev, Severyn V. & Khaghaninia, Samad', 3],
    ['Korneyev, Severyn V. & Korneyev, Valery A.', 26],
    ['Kovac, D. & Kameneva, E. P. & Korneyev, V. A.', 22],
    ['Malloch, John Russell', 5],
    ['Merz, B. & Kofler, A.', 12],
    ['Namin, Saeed Mohamadzade & Korneyev, Severyn V.', 11],
    ['Namin, Saeed Mohamadzade & Korneyev, Valery A.', 33],
    ['Sforzi, Alessandra & Sommaggio, Daniele', 12],
    ['Other (18)', 24]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=196)',
    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);