function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bilqees, Fatima Mujib', 2],
    ['Dollfus, R. P.', 1],
    ['Fischthal, Jacob H. & Thomas, J. D.', 1],
    ['Gu, Chang-dong & Shen, J. - w.', 1],
    ['Ho, G. H. & Kim, Y. C.', 1],
    ['Kurochkin, Y. V. & Parukhin, A M & Korotaeva, V. D.', 6],
    ['Lebedev, B. I.', 1],
    ['Paredes-León, Ricardo & García-Prieto, Luis', 1],
    ['Parukhin, A M', 1],
    ['Qiu, Z. - z. & Li, Q. & Zhang, R. & Chen, X. & Liang, Z.', 1],
    ['Shen, J. - w.', 1],
    ['Srivastava, H. D.', 1],
    ['Yamaguti, S.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);