function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Duszynski, Donald W. & Bolek, Matthew G. & Upton, Steve J.', 1],
    ['Elmberg, Johan', 1],
    ['Macaluso, Loredana & Wencker, Lukardis C M & Castrovilli, Maria', 1],
    ['Rage, Jean-Claude & Bailon, Salvador', 4],
    ['Venczel, Márton & Stiuc, Emanoil', 1],
    ['Villa, Andrea & Macaluso, Loredana & Mörs, Thomas', 1],
    ['Wielstra, B. & Arntzen, J. W.', 1],
    ['Wielstra, B. & Litvinchuk, S. N. & Naumov, B. & Tzankov, N.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);