function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Balasingam, E.', 1],
    ['Deblock, S. & Capron, A. & Brygoo, E. R.', 1],
    ['Fischthal, Jacob H. & Kuntz, Robert E', 1],
    ['Gupta, V. & Saxena, A. M.', 1],
    ['Kaikobad, Sarosh H. & Bilqees, Fatima Mujib', 1],
    ['Nama, H. S. & Khichi, P. S.', 6],
    ['Sahay, S. & Sahay, U.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);