function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ali, S. M. & Bagwan, I. M.', 1],
    ['Bilqees, Fatima Mujib & Durrani, F.', 2],
    ['Bilqees, Fatima Mujib & Khan, Aly', 1],
    ['Gu, Chang-dong & Shen, J. - w.', 2],
    ['Hafeezullah, M.', 1],
    ['Lokhande, L. U.', 1],
    ['Oshmarin, P. G.', 1],
    ['Parukhin, A M', 1],
    ['Pritchard, M. H.', 1],
    ['Velasquez, Carmen C.', 1],
    ['Vigueras, I. P.', 1],
    ['Yadav, B. B.', 2],
    ['Yamaguti, S.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    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);