function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chandler, Asa C.', 1],
    ['Delyamure, S. L. & Serdyukov, A. M.', 1],
    ['Gaevskaya, A. V. & Kovaleva, A. A.', 1],
    ['Gu, C. - d.', 1],
    ['Guiart, J.', 4],
    ['Hafeezullah, M.', 1],
    ['Sahai, D. & Srivastava, H. D.', 1],
    ['Stunkard, Horace W.', 1],
    ['Yamaguti, S.', 4],
    ['Zaidi, Daulat Ali & Khan, Daler', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);